The average score of boys in an examination in a school is 71 and that of the girls is 73. The average score of the school is 71.8. The ratio of the number of boys to that of the girls that appeared in the examination is
71.8 = (71x+73y)/(x+y)?
71.8 (x+ y) = 71x + 73y
0.8x = 1.2y
x:y = 12:8 which is equals to 3:2
|
A completes a work in 2 days, B in 4 days, C in 9 and D in 18 days. They form group of two such that difference is maximum between them to complete the work. What is difference in the number of days they complete that work? |
Answer |
|
How many 4 digit numbers contain number 2. |
Answer |
|
How many three digit numbers abc are formed where at least two of the three digits are same. |
Answer |
|
How many kgs of wheat costing Rs.24/- per kg must be mixed with 30 kgs of wheat costing Rs.18.40/- per kg so that 15% profit can be obtained by selling the mixture at Rs.23/- per kg? |
Answer |
|
What is the next number of the following sequence |
Answer |
|
How many numbers are divisible by 4 between 1 to 100 |
Answer |
|
There are 16 people, they divide into four groups, now from those four groups select a team of three members,such that no two members in the team should belong to same group. |
Answer |
|
7 people have to be selected from 12 men and 3 women, Such that no two women can come together. In how many ways we can select them? |
Answer |
|
Tennis players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played? |
Answer |
|
7528 : 5306 :: 4673 : ? |
Answer |