Multiple Choice QuestionsTwo vessels contain milk and water in the ratio 3 : 2 and 7 : 3. Find the ratio in which the contents of the two vessels have to be mixed to get a new mixture in which the ratio of milk and water is 2 : 1.
2 : 1
1 : 2
4 : 1
4 : 1
B.
1 : 2
Ratio in the first mixture = 3 : 2 = 
... (i)
Ratio in the second mixture = 7 : 3 = 
...(ii)
New ratio = 2 : 1 = 
Required ratio
The students in three classes are in the ratio 4 : 6 : 9. If 12 students are increased in each class, the ratio changes to 7 : 9 : 12. Then the total number of students in the three classes before the increase is
95
76
100
100
There is a ratio of 5 : 4 between two numbers. If 40 percent of the first is 12, then 50% of the second number is
12
24
18
18
Annual income of Amit and Veeri are in the ratio 3 : 2, while the ratio of their expenses is 5 : 3. If at the end of year each saves ₹ 1,000, the annual income of Amit is
₹ 9,000
₹ 8,000
₹ 7,000
₹ 7,000
P varies inversely with the product of Q and R. When Q = 6 and R = 12, P = 75. When Q = 5, R = 10, then P is
75
6
108
108
₹ 864 is divided among A, B and C such that 8 times A's share is equal to 12 times B's share and also equal to 6 times C's share. How much did B get?
₹ 399
₹ 192
₹ 288
₹ 288
5 members of a team are weighted consecutively and their average weight calculated after each member is weighed. If the average weight increases by one kg each time, how much heavier is the last player than the first one?
4 kg
20 kg
8 kg
8 kg
Out of nine persons, 8 persons spent ₹ 30 each for their meals. The ninth one spent ₹ 20 more than the average expenditure of all the nine. The total money spent by all of them was
₹ 260
₹ 290
₹ 292.50
₹ 292.50
In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average age of the school is 11 years and 9 months, then the number of girls in the school is
450
150
250
250
The mean of 100 item was 46. Later on, it was discovered that an item 16 was misread as 61 and another item 43 was misread as 34. It was also found that the number of items was 90 and not 100. Then what is the correct mean?
50
50.7
52
52
Switch
