Question

Find probablity when a number is chosen from list of the numbers from 21 to 80 a) prime number b) a perfect square c) not a multiple of 11

Answer 1

14/51 as there are 14 prime nos and total numbers is 51

4/51 only 4 prime nos are there

45/51 as there are only 6 multiples of 11

Answer 2

a) p(prime number)= 14/60 or 7/30
b)p(a perfect square)= 4/60 or 1/15
c)p(not a multiple of 11)=54/60 or 9/10