The number of products that can be formed with 10 prime numbers taking two or more at a time is

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210

210−1

210−11

210−10

answer is C.

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Detailed Solution

The number of products that can be formed with 10 prime numbers taking two or more at a time is =10c2+10c3+−−−+10c10 =210−10c1−10c0=210−11

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