Question

10th class
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2X5OH
If A={1,2, 3, 43 , B. {3,4, 1,6,7} then find
1 AUB
1) AB
”) Divide the polynomial POX) = ****52-3 by **
g(x)= x 2 and find the remainder and the
physics
2x 50​

Answer 1

Step-by-step explanation:

11th

Maths

Sets

Subset, Proper Subset, Power and universal Set

If X = {1, 2, 3, ..., 10 }...

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Asked on October 15, 2019 by

Paluck Perumal

If X={1,2,3,...,10} and A={1,2,3,4,5}. Then, the number of subsets B of X such that A−B={4} is

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ANSWER

Given, X={1,2,3,....,10}

and A={1,2,3,4,5}

Now, A−B={4}

⇒B=A−{4}={1,2,3,4,5}−{4}

={1,2,3,5}

∴X−{4}−B

={1,2,3,...,10}−{4}−{1,2,3,5}

={6,7,8,9,10}

Therefore,number of subsets B of X i.e., {6,7,8,9,10} =2

5

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