27. A Students was asked to find the arithmetic mean of the numbers 3, 11, 7, 9, 15, 13, 8, 19, 17,

21, 14 and x. He found the mean to be 12. What should be the number in place of x?

a) 3 b) 7 c) 17 d) 31 e) None of these

28. Which of the following is a pair of co-primes?

a) (16, 62) b) (18, 25) c) (21, 35) d) (23, 92) e) None of these

29. A camel pursue an elephant and takes 5 leaps for every 7 leaps of the elephant, but 5 leaps of

elephant are equal to 3 leaps of camel. What is the ratio of speeds of camel and elephant?

a) 21 : 25 b) 24 : 23 c) 25 : 21 d) 23 : 24 e) None of these

30. A, B and C jointly thought of engaging themselves in a business venture. It was agreed that A

would invest Rs.6500 for 6 months, B, Rs.8400 for 5 months and C, Rs.10,000 for 3 months. A

wants to be the working member for which, he was to receive 5% of the profits. The profit earned

was Rs.7400. Calculate the share of B in the profit.

a) Rs.1900 b) Rs.2660 c) Rs.2800 d) Rs.2840 e) None of these

21, 14 and x. He found the mean to be 12. What should be the number in place of x?

a) 3 b) 7 c) 17 d) 31 e) None of these

28. Which of the following is a pair of co-primes?

a) (16, 62) b) (18, 25) c) (21, 35) d) (23, 92) e) None of these

29. A camel pursue an elephant and takes 5 leaps for every 7 leaps of the elephant, but 5 leaps of

elephant are equal to 3 leaps of camel. What is the ratio of speeds of camel and elephant?

a) 21 : 25 b) 24 : 23 c) 25 : 21 d) 23 : 24 e) None of these

30. A, B and C jointly thought of engaging themselves in a business venture. It was agreed that A

would invest Rs.6500 for 6 months, B, Rs.8400 for 5 months and C, Rs.10,000 for 3 months. A

wants to be the working member for which, he was to receive 5% of the profits. The profit earned

was Rs.7400. Calculate the share of B in the profit.

a) Rs.1900 b) Rs.2660 c) Rs.2800 d) Rs.2840 e) None of these