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A ticket is drawn from two hundred tickets numbered from 1 to 200. Find the probability that the number is divisible by 2 or 3 or 5.

(a) 1/3
(b) 1/2
(c) 2/3
(d) 3/4

User Voho
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1 Answer

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Final answer:

The probability of selecting a ticket divisible by 2 or 3 or 5 is 0.7 or 70%.

Step-by-step explanation:

To find the probability that the number drawn is divisible by 2 or 3 or 5, we need to determine the total number of tickets that are divisible by 2 or 3 or 5 and divide it by the total number of tickets. Let's calculate:

The number of tickets divisible by 2: There are 200/2 = 100 tickets.

The number of tickets divisible by 3: There are 200/3 = 66 tickets.

The number of tickets divisible by 5: There are 200/5 = 40 tickets.

However, we have counted some tickets twice as they are divisible by multiple numbers. To correct this, we need to find the numbers that are divisible by both 2 and 3, both 3 and 5, and both 2 and 5.

The number of tickets divisible by both 2 and 3: There are 200/6 = 33 tickets.

The number of tickets divisible by both 3 and 5: There are 200/15 = 13 tickets.

The number of tickets divisible by both 2 and 5: There are 200/10 = 20 tickets.

The number of tickets divisible by 2, 3, or 5: 100 + 66 + 40 - 33 - 13 - 20 = 140.

The probability of selecting a ticket divisible by 2 or 3 or 5: 140/200 = 0.7 or 70%.

User BigPete
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