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An examination paper which is divided into 2 groups consisting of 3 and 4 questions respectively, carries the note:"It is not necessary to answer all questions. One question must be answered from each group."In how many ways can an examinee select the questions?
number of way can group1 question be selected =3C1
number of way cab group2 question be selected =4C1
numeber of way can both be selected simultaneously =3C1*4C1=4*3=12 ANSWER