Average of two numbers is 8 and average of other three numbers is 3; the average of the five numbers is :
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1
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Nine persons went to a hotel for taking their meals. Eight of them spent Rs. 12 each on their meals and the ninth spent Rs. 8 more than the average expenditure of all the nine. What was the total money spent by them.
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2
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The average of five numbers is 7. If three new numbers would be added, then the new average comes out to be 8.5. What is the average of those three new numbers ?
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3
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The average of 20 students is 12 years, if the teacher's age is included, average increases by one. The age of the teacher is:
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4
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Sachin Tendulkar has a certain average for 11 innings. In the 12th innings he scores 120 runs and thereby increases his average by 5 runs. His new average is :
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5
Discuss

If 25a + 25b = 115, what is the average of a and b?
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6
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A cricketer scored some runs in his 21st innings, as a result, his average runs increased by 3. If the present average run is 40, how many runs he scored in the final innings?
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7
Discuss

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 grams. Find the weight of the teacher (in kg.)
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8
Discuss

The average of five numbers is 306.4. The average of the first two numbers is 431 and the average of the last two numbers is 214.5. What is the third number?
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9
Discuss

The average of 11 results is 60. If the average of first six results is 58 and that of last six is 63, find the 6th result
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10
Discuss

The average age of group of 20 girls is 15 years and that of another group of 25 boys it is 24 years. The average age of the two groups mixed together is :
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