The average height of a class of 18 students is 105 cm. After the arrival of 7 new students the average decreases by 5cm. Find sum of the heights of all the students in the class?
Correct answer B. 2500
Tip: press A, B, C or D to answer, and N for the next question.
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See allThe average earning of a shop for first three weeks of a month are 2750 per week. If the earnings of next 2 weeks are 4750 rupees then find total earnings of the 5 weeks?
Correct answer D. 13000
There are 45 persons staying at a hostel. The average expenses of a person for a day are rupees 20. The total expenses for all the persons for a week are?
Correct answer D. 6300
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A family of 6 has an average 25 and another of 9 has an average 41. The sum of the ages of the family members of both will be?
Correct answer E. none
The average of crimes per week in a city is A. Find the number of crimes in 4 weeks?
Correct answer C. 4A
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