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A number is selected at random from 1 through 100, inclusive, What is the probability that the number

(a) is a perfect square

(b) is a multiple of 3

 

Thanks!!!

 Dec 18, 2020
 #1
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1- 100     100 choices

1   4   9  16  25   36  49  64  81 100 are the perfect squares     10 out of 100

 

Multiple of 3    there are 33    3 - 99        33 out of 100

 Dec 18, 2020
 #2
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1  3  4  6  9  12  15  16  18  21  24  25  27  30  33  36  39  42  45  48  49  51  54  57  60  63  64  66  69  72  75  78  81  84  87  90  93  96  99  100  >>Total = 40 such numbers.

 

Probability = 40 / 100 =2 / 5

 Dec 18, 2020
 #3
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Thanks!!!

😀

 Dec 18, 2020

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