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प्रश्न
A page is selected at random from a book. The probability that the digit at units place of the page number chosen is less than 7 is
विकल्प
`3/10`
`7/10`
`3/9`
`7/9`
उत्तर
`7/10`
Explanation;
Hint:
Here n(S) = 10 ...(given digit at limit place. It has two digit)
n(A) = 7
P(A) = `("n"("A"))/("n"("S")) = 7/10`
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