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Maths-

General

Easy

Question

A one-digit positive integer will be chosen at random. What is the probability that the chosen integer will be greater than 7? (Express your answer as a fraction or decimal, not as a percent.)

The correct answer is: 0.222

HINT :- Use general formula of probability
Explanation :- probability of finding the 1 digit positive integer greater than 7 is
$fraction numerator left parenthesis n o. space o f space 1 space d i g i t space p o s i t i v e space i n t e g e r s space g r e a t e r space t h a n space 7 right parenthesis over denominator left parenthesis t o t a l space n o. o f space 1 space d i g i t space p o s i t i v e space i n t e g e r s right parenthesis end fraction$
Step 1: finding the no. of 1 digit positive integers greater than 7
no. of 1 digit positive integers greater than 7 = 2(i .e 8 and 9)
Step 2: finding the total no. of 1 digit positive integers
total no. of 1 digit positive integers = 9 (i. e 1,2,3,4,5,6,7,8and 9)
∴probability = $2 over 9$ = 0.222

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