Questions

Let x be the number of 5 digit numbers sum of whose digits is even and y be the number of 5 digit numbers

sum of whose digits is odd, then

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a

x=y

b

x+y = 90,000

c

x= 45,000

d

x < y

NEW

detailed solution

Correct option is A

x =9 x 10 x 10 x 10 x 5 = 45000Similarly y= 45,000x = y & x+y= 90,000

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A teacher takes three children from her class to a zoo at a time, but she does not take the same three children to the zoo more than once. She finds that she went to the zoo 84 times more than a particular child has gone to the zoo. The number of children in her class is

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