Of 132 examinees of a certain class, the ratio of passed to failed students is 9 : 2. If 4 more students passed, what would have been the ratio of passed to failed students?

1. 3 : 28

2. 28 : 5

3. 4 : 25

4. 25 : 4

There are three boxes – P, Q and R, containing marbles in the ratio 1 : 2 : 3. Total number of marbles is 60. The above ratio can be changed to 3 : 4 : 5 by transferring :

1. 2 marbles from P to Q and 1 from R to Q

2. 3 marbles from Q to R

3. 4 marbles from R to Q

4. 5 marbles from R to P

If 3A = 5B and 4B = 6C, then A : C is equal to :

1. 2 : 5

2. 3 : 5

3. 4 : 5

4. 5 : 2

If, A : B = 7 : 9 and B : C = 5 : 4, then A : B : C is:

1. 7 : 45 : 36

2. 28 : 36 : 35

3. 35 : 45 : 36

4. none of these