Ask a Doubt

Request a call back

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

CBSE Class 12-science Answered

21st sum plz

Asked by lovemaan5500 | 03 Oct, 2019, 05:46: AM

Expert Answer

Let A be an event of A speaking truth and B be the event of B speaking truth

P left parenthesis A right parenthesis equals 2 over 3 space rightwards double arrow P left parenthesis A apostrophe right parenthesis equals 1 third P left parenthesis B right parenthesis equals 4 over 5 rightwards double arrow P left parenthesis B apostrophe right parenthesis equals 1 fifth N o w comma space b o t h space o f space t h e m space a g r e e space i n space 2 space w a y s 1. space W h e n space b o t h space a r e space l y i n g space 2. space W h e n space b o t h space s p e a k s space t h e space t r u t h S o comma space t h e space p r o b a b a l i t y space o f space b o t h space l y i n g space left parenthesis t h e space b a l l space d r a w n space f r o m space t h e space b a g space i s space n o t space b l a c k comma space b u t space t h e y space a r e space s a y i n g space i t space i s space b l a c k right parenthesis equals 1 third cross times 1 fifth cross times 5 over 6 P r o b a b i l i t y space o f space b o t h space s p e a k s space t r u t h equals 2 over 3 cross times 4 over 5 cross times 1 over 6 S o comma space t h e space p r o b a b i l i t y space t h a t space t h e space s t a t e m e n t s space a r e space t r u e equals fraction numerator 2 over 3 cross times 4 over 5 cross times 1 over 6 over denominator open parentheses 2 over 3 cross times 4 over 5 cross times 1 over 6 close parentheses plus open parentheses 1 third cross times 1 fifth cross times 5 over 6 close parentheses end fraction equals fraction numerator 8 over denominator 8 plus 5 end fraction equals 8 over 13 H e n c e comma space t h e space p r o b a b i l i t y space t h a t space t h e space s t a t e m e n t s space a r e space t r u e space i s space 8 over 13.

Answered by Renu Varma | 03 Oct, 2019, 10:14: AM

Concept Videos

Practice Test

Webinar

Pre Board Assessment

Answered Unanswered My Questions My Answers

CBSE 12-science - Maths

Assuming the probability of a male birth as 1/2, find the probability that a family of 3 children will have: a) two boys and one girl b) at most two girls

Asked by arjunsah797 | 03 May, 2022, 10:04: AM

ANSWERED BY EXPERT

CBSE 12-science - Maths

Plz answer 8 b part

Asked by lovemaan5500 | 07 Feb, 2020, 09:47: AM

ANSWERED BY EXPERT

CBSE 12-science - Maths

20th sum plz

Asked by lovemaan5500 | 08 Oct, 2019, 09:43: PM

ANSWERED BY EXPERT

CBSE 12-science - Maths

14th sum and plz explain its statement

Asked by lovemaan5500 | 03 Oct, 2019, 05:47: AM

ANSWERED BY EXPERT

CBSE 12-science - Maths

21st sum plz

Asked by lovemaan5500 | 03 Oct, 2019, 05:46: AM

ANSWERED BY EXPERT

CBSE 12-science - Maths

four digit numbers are formed by using the digit 1,2,3,4 and 5 without repppearing any digit. Find the probability that a number chosen at random is an odd number

Asked by J.Jeya | 26 Jul, 2019, 09:29: AM

ANSWERED BY EXPERT

CBSE 12-science - Maths

Define conditional probability

Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM

ANSWERED BY EXPERT

CBSE 12-science - Maths

If A and B are two events such that P(A) = 0.4, P(B) = 0.55 and = 0.7. Then find P(A | B) and P(B | A).

Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM

ANSWERED BY EXPERT

CBSE 12-science - Maths

If A and B are two events such that 2P(A) = P(B) = 4/13 and P(A | B) = 3/7, then P(A B) = â€¦â€¦

Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM

ANSWERED BY EXPERT

CBSE 12-science - Maths

Let A and B be events of a sample space S of an experiment, then show that

Asked by Topperlearning User | 18 Aug, 2016, 10:31: PM

ANSWERED BY EXPERT

My Class Videos Tests Plans Ask a Doubt