Question

a die is thrown two times and the total score in two throws is noted.find the probability that the score is 1)an prime numbers 2) 7 3) at least 15

Answer 1

Answer:

1- 2

2- not possible because a die has only 6 digits

3- also not possible

Answer 2

Step-by-step explanation:

a) prime numbers till 12 = (2,3,5,7,11) 5

total score if two dices are thrown= 12

probability of prime number is

$\frac{5}{12}$

b) 7 can occur 1 time if two dices are thrown.

Total no. which can occur= 12

probability of 7 is

$\frac{7}{12}$

c) It is not possible to have 15 when max no. is 12..

probability is therefore

$\frac{0}{12} = 0$