The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is -
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A batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after 17th inning.
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If the arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is :
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One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/h. Find the average speed for the whole journey.
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The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is :
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A shop of electronic goods is closed on Monday. The average daily sales for remaining six days of a week is Rs. 15,640 and the average sale of Tuesday to Saturday is Rs. 14,124. The sales on Sunday is -
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If 25a + 25b = 115, what is the average of a and b?
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7
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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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8
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Find the average of the first 40 natural numbers.
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When the average age of a couple and their son was 42 years, the son married and got a child after one year. When the child was 5 years old, the average age of the family became 36 years. What was the age of daughter-in- law at the time of their marriage ?
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10
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a, b, c, d, e, f, g are consecutive even numbers. j, k, l, m, n are consecutive odd numbers. The average of all the numbers is :
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