Question

A box contains 20 marked with the number of 1 to 20One card is drawn from this box what is the probability that the number on the card is a prime number​

Answer 1

Answer:

From 1 to 20 there are 7 prime numbers I.e. 3,5,7,11,13,15,17,19.

Probability of getting prime number = 20/7 = 2 ⁶/⁷

Answer 2

Answer:

Step-by-step explanation:

i) prime numbers(1-20)= 1,2,3,5,7,11,13,17,19

Probabilty(E)=Number of favorable outcomes/Total number of outcomes

P(Prime numbers)= 9/20

ii)P(Perfect square)= 4/20 = 2/10 = 1/5

iii) P(Multiple of 5)=4/20 = 1/5