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Quantitative Aptitude

A+B+C=N (N Varying)

How many thre...

Question

How many three digit numbers have a digital root =8 with an order 1?

A

45

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B

36

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C

21

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D

28

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E

56

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Solution

The correct option is B 36
option (b)

question is A+B+C=8, where $a > 0$ . Question changes to A+B+C=7. Using 1-0 method, Answer is based on the arrangement of 7 zeroes and 2 ones $=^{9} C_{2} = 36$

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