A question paper has two parts P and Q each containing $10$ questions. If a student needs to choose $8$ from part A and $4$ from part B, in how many ways can he do that?

9450

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2524

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5251

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none of these

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Solution

The correct option is A $9450$
The student must choose $8$ from part $A$ $ξ$ $4$ from $B .$
$\Rightarrow$ $^{10} C_{8} \times^{10} C_{4} = 45 \times 210$
$= 9450.$
Hence, the answer is $9450.$

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A question paper has two parts P and Q each containing 10 questions. If a student needs to choose 8 from part A and 4 from part B, in how many ways can he do that?

The correct option is A 9450The student must choose 8 from part A ξ 4 from B.⇒ 10C8×10C4=45×210 =9450.Hence, the answer is 9450.

A question paper has two parts P and Q each containing $10$ questions. If a student needs to choose $8$ from part A and $4$ from part B, in how many ways can he do that?

The correct option is A $9450$
The student must choose $8$ from part $A$ $ξ$ $4$ from $B .$
$\Rightarrow$ $^{10} C_{8} \times^{10} C_{4} = 45 \times 210$
$= 9450.$
Hence, the answer is $9450.$