Question
From a bag containing 12 white and 15 yellow ribbons,
find the probability of picking 2 ribbons of each type at random.Solution
Required probability = (12C2 × 15C2)/27C4 = 77/195
More Probability Questions
To find the Next number in the given series.
342 510 726 996 1326 ?
...150 160 140 ? 130 180
...If 152,   242,    x ,  332,   404,    314,
then find the value of (2x – 1)?
...14, 28, 54, 98, 154, 224
120     119     ?     352      2464     2455
...219 365 511 ? 803 949
...12             10            13                18.5                  25.50       �...
?, 8, 32, 72, 128, 200
12, 24, 72, 288, 1440, ?
11Â Â Â 12.1Â Â Â Â 14.3Â Â Â Â 17.6Â Â Â Â Â 22Â Â Â Â Â ?
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