Question

A pair of fair dice is tossed repeatedly until a sum of 4 or an odd sum appears..Then probablity that s sum of 4 appears first..plzz anwer fast​

Answer 1

Answer:   A pair of fair dice is rolled together till a sum a either 5 or 7 is obtained. · For three events A,B and C,P(exactly one of the events A or B occurs)=P( ...

Step-by-step explanation:

Answer 2

Answer:

Let A denote the event that a sum of 7 occurs, B the event that a sum of 5 occurs and C the event that neither a sum of 5 nor a sum of 7 occurs.

We have P(A)=

366 = 61

,P(B)= 364= 91 ,P(C)= 3626 = 1813 .

Thus,

p=P(A or (C∩A) or (C∩C∩A) or ....)

=P(A)+P(C)P(A)+P(C)

2 P(A)+....= 1−P(C)

P(A)=1−13/18

1/6 =53 .