Question
22 defective pens are accidentally mixed with 136 good
ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen is taken out is a good one.Solution
Numbers of pens = Numbers of defective pens + Numbers of good pens ∴ Total number of pens = 136 + 22 = 158 pens P(E) = (Number of favourable outcomes) / (Total number of outcomes) P(picking a good pen) = 136/158 = 0.860
98, 89, 114, 50, 194, ?
What will come in place of the question mark (?) in the following series?
555, 430, ?, -320, -1320, -3320Â
The question below is based on the given series I. The series I satisfy a certain pattern, follow the same pattern in series II and answer the questions...
204, 401, 640, ?, 1105, 1406
What will come in place of the question mark (?) in the following series?
100, 729, 64, 343, 36, ?
What will come in place of the question mark (?) in the following series?
18, 25, 36, 49, 66, ?
124, 180, 108, 198, ?, 220
101, 103, 107, 109, 113, ?
Find the missing number in the given number series.
2, 5, 16, 65, 326, ?16Â Â Â 25Â Â Â 36Â Â Â 49Â Â Â 64Â Â Â Â ?
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