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20 passengers are to travel by a do...

20 passengers are to travel by a double decked bus which can accommodate 13 in the upper deck and 7 in the lower deck . The number of ways that they can be distributed is

A

`""^(20) C_8`

B

`""^(20)C_(9)`

C

`""^(20) P_(7)`

D

`""^(20)C_(7)`

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-PERMUTATIONS & COMBINATIONS-EXERCISE 1B (COMBINATIONS )
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