Question

card has no. 1,3,5,7---101 on it which are in a box and mixed thoroughly.one card is drawn at random. find the probability that no. on card is

1-a perfect square
2-prime no. less than 20

my answer for 1 is 5/51 and for 2nd- 7/51 is it correct? if not then please solve and help me!
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Answer 1

Answer:

Both of your answers are correct!!!!!!!!!!!

Answer 2

Answer:

1)Number on cards are 2 to 101

Even number are 2,4,6,..,100=50

Probability that it's an even number =50/100=1/2

2)Numbers less than 14 are 2,3,4,5,6,7,8,9,10,11,12,13=12

Probability=12/100=3/25

3) Perfect square are=4,9,16,25,36,49,64,81,100=9

Probability=9/100

4) Prime number less than 20 are 2,3,5,7,11,13,17,19=8

Probability=8/100=2/25