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Numerical Ability
Permutation and Combination
In a group of 15 students, 7 student have studied Latin, 8 students have studied Greek, and 3 have not studied either. How many of these studied both Latin and Greek
A. 3
B. 5
C. 4
D. 0
E. 2
Read Solution (Total 2)
-
- N(A* n B*)=nU - nA- nB+ n(AnB) wher A* is compliment..ie P(A)*=1-p(A)
3= 15- 8- 7+ X
thus X=3 - 10 years agoHelpfull: Yes(1) No(0)
- here 7 studies Latin
8 studies Greek
3 have not study Latin and Greek
so 15-3=12 studies both Latin and Greek
12P7 / 12P8 =1/5 studies both Latin and greek
15*1/5=3 students
Ans. A - 6 years agoHelpfull: Yes(0) No(0)
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