31.
A
milk vendor has 2 cans of milk.The first contains 25% water and the rest milk.The
second contains 50% water. How much milk should he mix from each of the
containers so as to get 12 litres of milk such that the ratio of water to
milk is 3 : 5 ?
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A. 4litres, 8 litres
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B.
6litres, 6 litres
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C. 5litres, 7 litres
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D. 7litres, 4 litres
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View Answer and Explanation:
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32.
The average of 5 quantities is 10 and the average of 3 of them is 9. What is
the average of the remaining 2?
a)
11 b) 12 c) 11.5 d) 12.5
View Answer and Explanation:
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33. A can contains a mixture of two liquids A
and B in the ratio
7 : 5. When 9 litres of mixture are drawn off and the can is filled with B,
the ratio of A and B becomes 7 : 9. How many litres of liquid A was contained
by the can initially?
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A. 10
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B. 20
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C.
21
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D. 25
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View Answer and Explanation:
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34.
When a student weighing 45 kgs left a class, the average weight of the
remaining 59 students increased by 200g. What is the average weight of the
remaining 59 students?
a)
57 kgs b) 56.8 kgs c)58.2 kgs d)52.2 kgs
View Answer and Explanation:
35.
Two vessels A and B contain milk and water mixed in the ratio 4: 3 and 2: 3. In
what ratio must these mixtures be mixed to form a new mixture containing half
milk and half water?
A.7:5
B.2:1
C.1:2
D.6:5
View Answer and Explanation:
36.
The average age of a group of 12 students is 20years. If 4 more students join
the group, the average age increases by 1 year. The average age of the new
students is
a)
24 b)26 c)23 d) 22
View Answer and Explanation:
37. A can contains a mixture of two liquids
A andB in the ratio 7: 5. When9 litres of mixture are drawn off and the can is
filled with B, the ratio of A and B becomes 7: 9. How many litres of liquid A
was containedby the can initially?. [Railways 1988]
A.25 B.20
C.21 D.10
View Answer and Explanation:
38. The average wages of a worker during a
fortnight comprising 15 consecutive working days was Rs.90 per day. During the
first 7 days, his average wages was Rs.87/day and the average wages during the
last 7 days was Rs.92 /day. What was his wage on the 8th day?
a)83 b) 92 c)90 d)97
View Answer and Explanation:
39.
The average of 5 quantities is 6. The average of 3 of them is 8. What is the
average of the remaining two numbers?
a)
6.5 b) 4 c) 3 d) 3.5
View Answer and Explanation:
40.
The average temperature on Wednesday, Thursday and Friday was 250. The average
temperature on Thursday, Friday and Saturday was 240. If the temperature on
Saturday was 270, what was the temperature on Wednesday?
a)
240 b)210 c) 270 d) 300
View Answer and Explanation:
