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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 Two-digit Number - Mathematics

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Sum

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 two-digit number

 

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Solution

Total number of discs = 90

Total number of two-digit numbers between 1 and 90 = 81

P (getting a two-digit number) = 81/90 =9/10

Concept: Probability - A Theoretical Approach
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APPEARS IN

NCERT Class 10 Maths
Chapter 15 Probability
Exercise 15.1 | Q 18.1 | Page 309
RD Sharma Class 10 Maths
Chapter 16 Probability
Exercise 16.1 | Q 43.1 | Page 23
RD Sharma Class 10 Maths
Chapter 16 Probability
Exercise 16.1 | Q 58.1 | Page 25
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