Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

ax2 + bx + c
Asked by VINOD G. KHETAN | 06 Jun, 2014, 11:49: AM
answered-by-expert Expert Answer
I n space o r d e r space t o space g e t space r e a l space r o o t s space f o r space q u a d r a t i c space e q u a t i o n comma space t h e space v a l u e space b squared minus 4 a c space greater or equal than space 0 s o space l e t s space f i n d space o u t space w h a t space a r e space t h e space p o s s i b l e space c o m b i n a t i o n s space a v a i l a b l e space t o space g e t space r e a l space r o o t s space left parenthesis a comma space b comma space c right parenthesis I f space b space equals space 1 comma space t h e n space t h e r e space i s space n o space p o s s i b i l t y space a t space a l l space f o r space r e a l space r o o t s. space S o space Z e r o I f space b space equals space 2 comma space t h e n space a equals space 1 space a n d space c space equals space 1 space i s space t h e space o n l y space p o s s i b i l t y space left parenthesis 1 comma space 2 comma space 1 right parenthesis. space S o space 1 space f o r space t h i s space c a s e I f space b space equals space 3 comma space t h e n space p o s s i b l e space s e t s space a r e space left parenthesis 1 comma space 3 comma space 1 right parenthesis space left parenthesis 1 comma space 3 comma space 2 right parenthesis space left parenthesis 2 comma space 3 comma space 1 right parenthesis. space S o space 3 space f o r space t h i s space c a s e I f space b space equals 4 comma space t h e n space p o s s i b l e space s e t s space a r e space left parenthesis 1 space 4 space 1 right parenthesis space left parenthesis 1 space 4 space 2 right parenthesis space left parenthesis 2 space 4 space 1 right parenthesis space left parenthesis 1 space 4 space 3 right parenthesis space left parenthesis 3 space 4 space 1 right parenthesis space left parenthesis 2 space 4 space 2 right parenthesis. space S o space 6 space f o r space t h i s space c a s e I f space b space equals space 5 comma space t h e n space p o s s i b l e space s e t s space a r e space space left parenthesis 1 space 5 space 1 right parenthesis space left parenthesis 1 space 5 space 2 right parenthesis space left parenthesis 2 space 5 space 1 right parenthesis space left parenthesis 1 space 5 space 3 right parenthesis space left parenthesis 3 space 5 space 1 right parenthesis space left parenthesis 2 space 5 space 2 right parenthesis space left parenthesis 3 space 5 space 2 right parenthesis space left parenthesis 2 space 5 space 3 space right parenthesis. space S o space 8 space f o r space t h i s space c a s e I f space b space equals space 6 comma space t h e n space p o s s i b e space s e t s space a r e space left parenthesis 1 space 6 space 1 right parenthesis space left parenthesis 1 space 6 space 2 right parenthesis space left parenthesis 2 space 6 space 1 right parenthesis space left parenthesis 1 space 6 space 3 right parenthesis space left parenthesis 3 space 6 space 1 right parenthesis space left parenthesis 2 space 6 space 2 right parenthesis space left parenthesis 3 space 6 space 2 right parenthesis space left parenthesis 2 space 6 space 3 space right parenthesis space left parenthesis 3 space 6 space 3 right parenthesis. space S o space 9 space f o r space t h i s space c a s e T o t a l space p o s s i b i l i t e s space f o r space r e a l space r o o t s space a r e space 0 space plus thin space 1 space plus space 3 plus space 6 space plus space 8 space plus space 9 space equals space 27 S o space p r o b a b i l i t y space i s space 27 over 216 equals 1 over 8
Answered by Dharma Teja | 06 Jun, 2014, 07:13: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
an integer is chosen at random from the first 50 positive integers . what is the probability that the chosen integer is divisible by 5
question image
Asked by aadityaanand2008 | 02 Jan, 2023, 11:22: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
probability
Asked by sonalikalantre193 | 02 Feb, 2022, 09:54: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
a dice is thrown once.find the probability of getting a number lying between 1 and 4.
Asked by kavitajasmine12345 | 02 Jan, 2022, 11:45: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
probability
Asked by plaltarapur | 25 Oct, 2021, 06:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Bag I contains 3 red and 4 black balls and Bag II contains 4 red and 5 black balls. Two balls are transferred at random from Bag I to Bag II and then a ball is drawn from Bag II. The ball so drawn is found to be red in color. Find the probability that the transferred balls were both black. Answer soon
Asked by Trisha Gupta | 23 Sep, 2021, 06:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
what is a polynomial
Asked by shwetarai12345678910 | 12 Oct, 2020, 06:24: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
if x is the number of black marbles from a set of 40 colourful marbles, another 30 black marbles are added to it and the probability becomes twice as the first case , what is the value of x
Asked by acshanadhana15 | 06 Aug, 2020, 01:53: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
  How many numbers are there BETWEEN 500 and 1000? (Needed for a probability question)
Asked by drhimasingh | 09 Mar, 2020, 11:06: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
1.What is the probability that a leap year has 52 Mondays? 2.Two numbers 'a' and 'b' are selected successively without replacement in that order from integers 1 to 10.The probability that a\b is an integer is   
Asked by officialmehak26 | 03 Feb, 2020, 03:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
A no.x is chosen at random from the numbers -3,-2,-1,0,1,2,3 the probability that x<2 is
Asked by officialmehak26 | 02 Feb, 2020, 08:08: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×