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A Box Contains 90 Discs Which Are Numbered from 1 to 90. If One Disc is Drawn at Random from the Box, Find the Probability that It Bears A Number Divisible by 5. - CBSE Class 10 - Mathematics

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Question

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a number divisible by 5.

Solution

Total number of discs = 90

Numbers that are between 1 and 90 and divisible by 5 are 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, and 90. Therefore, total numbers divisible by 5 = 18

Probability of getting a number divisible by 5 = 18/90 = 1/5

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APPEARS IN

 NCERT Solution for Mathematics Textbook for Class 10 (2019 to Current)
Chapter 15: Probability
Ex.15.10 | Q: 18.3 | Page no. 309
 NCERT Solution for Mathematics Textbook for Class 10 (2018 to Current)
Chapter 15: Probability
Ex.15.10 | Q: 18.3 | Page no. 309
Solution A Box Contains 90 Discs Which Are Numbered from 1 to 90. If One Disc is Drawn at Random from the Box, Find the Probability that It Bears A Number Divisible by 5. Concept: Probability - A Theoretical Approach.
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