there are 6 chemical elements called NOBLE GASES.suppose you write the names of all 112 elements on cards and select a card without looking .what is the probability of not picking a NOBLE GAS

Question

anonymous · Answer

Probability of occurence=P(E)
P(E)=6/112=3/56
Probability of non occurence=1-P(E)
                                             =1-3/56
                                             =(56-3)/56
                                             =53/56=0.95