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A bag has 35 balls and each ball is numbered from 1 to 35. The balls are mixed up inside the bag and a random one is drawn. What is the probability that the chosen ball has a number which is a multiple of 7 or 4?

Sagot :

Step-by-step explanation:

Answer:

There are 35/7 =5 multiples of 7

There are 35/4 = 8 (must round down to nearest integer) multiples of 4

However, there is one overlap, because there is 35/(7*4) = 1 (round down again) multiple of 28, which combines 7 and 4.

Thus, the total number of possibilities is 5+8–1 = 12

The odds of picking one of these, then, is 12/35 = 0.34 or 34% probability

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