Ask a Doubt
Request a call back

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

CBSE Class 12-science Answered

9th sum
question image
Asked by lovemaan5500 | 03 Oct, 2019, 05:47: AM
answered-by-expert Expert Answer
Let X be the random variable which represents defective items drawn.
Then x can take values 0,1,2,3,4
n(S) = total possible ways of selecting 5 items = 25C4 
P(X = 0) = 20C4 / 25C4  = 969/2530
P(X = 1) = 5C1 × 20C3 / 25C4 = 114/253
P(X = 2) = 5C2 × 20C2 / 25C4 = 38/253
P(X = 3) = 5C3 × 20C1 / 25C4 = 4/253
P(X = 4) = 5C4  / 25C4 = 1/2530
Answered by Sneha shidid | 03 Oct, 2019, 09:54: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Maths
A Five digits number is written down at random. Find the probability that number is divisible by 5 and no two consecutive digits are identical.
Asked by rairp2017 | 27 May, 2021, 12:21: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
9th sum
question image
Asked by lovemaan5500 | 03 Oct, 2019, 05:47: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Four rotten oranges  are accidently mixed with 16 good ones . three oranges are drawn at random from the mixed lot . let X be the no of rotten oranges drawn . Find mean and variance of X
Asked by haroonrashidgkp | 07 Nov, 2018, 09:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Two cards are drawn  from a well shuffled pack of 52 cards. Find the probability distribution of number of kings. Also compute the variance for the number of kings
Asked by haroonrashidgkp | 05 Nov, 2018, 09:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Let X denote a random variable. The probability that X can take the values x, has the following form, where k is some unknown constant. Find the value of k.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Write the probability distribution table and find the mean of the variable Y whose probability distribution is given graphically.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
A bag contains 2 red and 3 black balls . One ball is drawn and put back into the bag.This is done three times and everytime a red ball is drawn, it is counted as a success.Let 'X' denote the number of successes.is 'X' a random variable. Justify your answer
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Maths
A bag contains 2 red and 3 black balls . One ball is drawn and put back into the bag. This is done three times and everytime a red ball is drawn, it is counted as a success.Let 'X'be a random variable that denotes the number of successes. Shaw that X is a function of the Sample space.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: 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
×