events are 99
events wanted 6
so probability is 6/99
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Prob(Pick 6 from 1-15 in 99 trials) = 1 - Prob(Don't pick 6 from 1-15 in 99 trials) = 1 - (14/15)99 = 1 - (0.933...)99 = 1 - 0.00108 approx = 0.9989
well it Will be even
1/6Because:There is a 4 in 9 chance of picking a red ball the first time and 3 in 8 chance of picking a red ball the second time. The chance of picking two reds as the first two balls is 4/9 x 3/8 or 12/72 or 1/6
The probability, in one draw, is 6/20 or 30%
The event space comprises the numbers 10 to 99, 90 such numbers. The favourable events are 15, 21, 27, ... , 99. There are 15 such numbers. So the probability is 15/90 = 1/6