Question

when a dice is thrown, find the probability of not getting a prime number.

Answer 1

Hi.

Possible outcomes when a dice is thrown = 1, 2, 3, 4, 5 and 6

Total Number of outcomes = 6

Favourable Outcomes (Prime Numbers) = 2, 3, 5

Number of Favourable outcomes = 3

Probability of getting a prime number (P) = 3/6 = 1/2

Probability of Not getting a prime number = 1 - P = 1 - 1/2 = (2 - 1)/2 = 1/2

Therefore, Probability of not getting a prime number = 1/2

Hope it helps.

Answer 2

If the dice is thrown , the possible outcomes :

1,2,3,4,5,6

Non prime numbers : 1,4,6 [1 is neither prime nor composite] = 3 in counting

Total Outcomes = 6

Then , the probability of getting non prime [P] =

Number of Non Prime Numbers / Total Outcomes = 3/6 = 1/2 .

Hence the probability is 1/2 .

#Be Brainly !!