Question
There are 6 Apples and some oranges in a basket. If 2
fruits are picked at random, the probability that both are Apples is 1/8. How many oranges are there?Solution
Let the number of oranges be 'x'
Number of Apples = 6
Probability that both fruits are Apples = 1/8
So, 6 C 2 / 6+x C 2  = 1/8
30/((x + 5)(x + 6)) = 1/8
x 2 Â + 11x - 210 = 0
(x + 21)(x - 10) = 0
x = 10
What will come in place of the question mark (?) in the following series?
112, 124, 138, 154, ?, 196
12 ? 545 2729 10919
7, 8, 18, 57, 232, ?
What will come in place of the question mark (?) in the following series?
45, 54, 72, ?, 126, 162
155, 157, 160, ?, 172, 183
What will come in place of the question mark (?) in the following series?
50, 70, 110, 190, 310, ?
What will come in place of the question mark (?) in the following series?
18, 22, 34, 70, 178, ?
3.6 × 1.5 + 8.4 × 2.5 – 9.2 × 3.5 = ? – 9.2 × 4.4
23, 28, 38, 49, 62, ?
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
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