- In how many ways a group of 4 boys and 3 girls be made out of a total of 8 boys and 5 girls ?
140180720560None of theseOption A
=8C4 * 5C3 - There are 8 boys and and 7 girls.In how many ways a group of 5 people can be made such that the particular girls is always to be included?
100598512001001None of theseOption D
Ways are 14C4 - There are 6 boys and 7 girls.In how many ways a committee of 4 mmebers can be made such that a particular boy is always to be excluded?
502550605495None of theseOption D
Ways are 12C4. - In a group of 8 men,2 boys aged at 21 and 23 were replaced two new men.Due to this the average cost of the group increased by 2 years.What is the average age of the 2 new mens?
28302032None of theseOption B
Total age of mens=8*2=16 years
Sum=21+23+16=60
Average=60/2=30 years - Three years ago,the average age of P,Q and R was 27 years.Also 5 years ago,the average age of Q and R was 20 years.What is the present age of P?
50 years55 years52 years40 years42 yearsOption D
Sum three years ago=27*3=81
At present age=81+3*3=90
Present age of Q and R=20*2+5*2=50
So90-50=40 - If mani spends Rs 1000 for the first 5 months,Rs 2000 for the next 4 months and Rs 3000 for the next 3 months and he saves Rs 2000 in the whole year then his average monthly will be hwat?
Rs 1000Rs 2000Rs 3000Rs 4500None of theseOption B
=1000* 5 + 2000* 4 + 3000*3 + 2000
=24000
=24000/12=2000 - Study the following and answer the questions:
68 , 117 , 61 , 124 , 54 , ?
128131145140None of theseOption B
68-7=61
61-7=54
124+7=131 - 3.25 , 6.5 , 19.5 , 78 , 390 , ?
2550250023402450None of theseOption C
3.25*2=6.5
6.5*3=19.5
19.5*4=78 - 8 , 4 , 4 , 8 , 32 , ?
480450256512None of theseOption C
- 6 , 8 , 8 , 22 , ? , 151
45475552None of theseOption B
6*1+2=8
8*1.5-4=8
8*2+6=22
22*2.5-8=47
