Question

10. What is the probability that a number selected from the numbers 1, 2, 3, ... 20 is not a multiple of 3
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Answer 1

From Number1,2,3,4,5,6,7,8,9,10,11,12,13,14,15

From 1 to 15, Multiples of 4 are 4, 8, 12 only

So Probability=

Total Number given

Count of No. which are multiple of 4

Prob.=

15

3

=

5

1

ᴍᴀᴋᴇ ᴀꜱ ʙʀᴀɪɴʟɪꜱᴛ ᴀɴꜱᴡᴇʀ

Answer 2

Answer:

7 / 10

Step-by-step explanation:

the multiples of 3 are 3, 6, 9, 12, 15 and 18

therefore the probability is 14 / 20

14 / 20 = 7 / 10