Question
If A and B are two sets such that the number of elements
in A is 20, a number of elements in B is 18 and the number of elements in both A and B is 10, find n(A È B).Solution
Given: -  n(A) = 20  n(B) =18 n(A∩B) = 10 Substitute these values into the formula-  n(AUB) =20+18-10 = 28
What should come in place of (?) question mark in the given number series.
81, 73, 66, 60, 55, ?
14 6 4 4 ? 48
...What should come in place of (?) question mark in the following number series.
5, 11, 23, 47, 95, ?
In each of the following number series, one term is missing. Find the missing term.
1, 4, 9, 16, 25, ?
What will come in place of the question mark (?) in the following series?
4, 11, 32, 95, 284, 851, ?
156, 182, 210, 240, 272, ?
31    32      35      ?      47       56
...What should come in place of (?) question mark in the following number series.
1, 2, 6, 24, 120, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 244254, ?, 1022, 1150, 1214, 1246
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