## Question

### Solution

Correct option is  For ai ∈ A, we have the following choice:  Out of these only (ii), (iii) and (iv) imply .

Therefore, the number of required subset is 3n.

#### SIMILAR QUESTIONS

Q1

In a group of 8 girls, two girls are sisters. The number of ways in which the girls can sit so that two sisters are not sitting together is

Q2

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Q3 Q4

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Q5

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Q6

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Q7

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Q8

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Q9

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Q10

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