The average of non-zero number and its square is 5 times the number. The number is__________? A. 9 B. 17 C. 29 D. 295 Explanation: Let the number be x. Then, (x + x2)/2 = 5x => x2 – 9x…
The average of the two-digit numbers, which remain the same when the digits interchange their positions, is__________? A. 33 B. 44C. 55 D. 66 Explanation: Average = (11 + 22 + 33 + 44 + 55 + 66 + 77…
The average of first five multiples of 3 is____________? A. 3B. 9 C. 12 D. 15 Explanation: Average = 3(1 + 2 + 3 + 4 + 5)/5 = 45/5 = 9
Find the average of all the numbers between 6 and 34 which are divisible by 5. A. 18B. 20 C. 24 D. 30 Explanation: Average = (10 + 15 + 20 + 25 + 30)/5 = 100/5 = 20
The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero? A. 0 B. 1 C. 10D. 19 Average of 20 numbers = 0 Sum of 20 numbers = (0 * 20)…
Sarfaraz obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks? A. 65 B. 69 C. 72D. None of these Average = (76 + 65 + 82…
A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3 chocolates. Find the respective number of boys and girls? A. 70, 50B. 60, 60 C. 50,…
Rs. 6000 is lent out in two parts. One part is lent at 7% p.a simple interest and the other is lent at 10% p.a simple interest. The total interest at the end of one year was Rs. 450. Find…
A trader purchased two colour televisions for a total of Rs. 35000. He sold one colour television at 30% profit and the other 40% profit. Find the difference in the cost prices of the two televisions if he made an…
The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group? A. 21 B. 22C.…