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JEE MATHEMATICS MCQ: COMBINATIONS

1 Easy

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Analyzing +4 | -1

If the number of ways of selecting

n

cards out of unlimited number of cards bearing the number

0,9,3

, so that they cannot be used to write the number 903 is 93 , then

n

is equal to

View answer and explanation

Correct option: C

5

The correct answer is C (5) because by analyzing the conditions under which the cards cannot be used to write the number 903, we find that n = 5.

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n