Study the following information to answer the question :
In an institute having 1500 students boys and girls are in the ratio of 2 : 3 respectively.Students are attending one or more hobby classes out of A , B and C. Out of the boys, 18% are attending only A classes, 16% are attending only B classes and 14% are attending only C classes, 12% of the boys areattending only A and B classes, 15% are attending only B and C classes, 14% are attending only A and C classes and remaining boys are attending all three classes. Out of the girls 17% are attending only A classes, 16% are attending only B classes and 13% are attending only C classes, 15% of the girls are attending only A and B classes, 18% are attending only B and C classes, 12% are attending only A and C classes and remaining girls are attending all three classes.
1.What is the difference between
number of boys attending only one of the three hobby classes and the number of
girls attending only one of the three hobby classes ?
1.116
2.126
3.118
4.132
5.120
2. How many boys are attending at
least two hobby classes ?
1.308
2.320
3.336
4.312
5.306
3. What percent of the students do not
attend C classes ?
1.44.9
2.42.9
3.48.6
4.44.6
5.47.2
4. Number of boys attending all three
hobby classes is approximately what percent of the number of girls attending
all three hobby classes ?
1.87
2.72
3.89
4.76
5.81
5.. What is the number of boys
attending B classes ?
1.329
2.324
3.369
4.352
5.365
Solution And Answers:
Boys :
only A classes = 18*6=108
only B classes = 16*6 = 96
only C classes = 14*6 = 84
only A and B classes = 12*6= 72
only B and C classes = 15*6 =90
only A and C classes = 14*6 = 84
attending all three classes = 66
Girls :
only A classes = 17*9=153
only B classes = 16*9 = 144
only C classes = 13*9 = 117
only A and B classes = 15*9= 135
only B and C classes = 18*9 =162
only A and C classes = 12*9 = 108
attending all three classes = 81
Answers :
1.2
2.4
3.5
4.5
5.2
