Mathematics mcqs

the average of 18 observations was calculated and it was 124. later on it was discovered that two observations 46 and 82 were incorrect. the correct values are 64 and 28. the correct average of 18 observations is-----------?

the average of 18 observations was calculated and it was 124. later on it was discovered that two observations 46 and 82 were incorrect.

123

121

137

122

the average monthly salary of 20 employees in an organisation is rs. 1500. if the manager’s salary is added, then the average salary increases by rs. 100. what is the manager’s monthly salary?

the average monthly salary of 20 employees in an organisation is rs. 1500. if the manager’s salary is added, then the average salary increases by rs.

rs. 3600

rs. 2000

rs. 4800

rs. 2400

the average monthly income of p and q is rs. 5050. the average monthly income of q and r is 6250 and the average monthly income of p and r is rs. 5200. the monthly income of p is------------?

the average monthly income of p and q is rs. 5050. the average monthly income of q and r is 6250 and the average monthly income of p and r is rs. 5200.

rs. 4050

rs. 5000

rs. 3500

rs. 4000

the average age of students of a class is 15.8 years. the average age of boys in the class is 16.4 years and that of the girls is 15.4 years. the ration of the number of boys to the number of girls in the class is-----------?

the average age of students of a class is 15.8 years. the average age of boys in the class is 16.4 years and that of the girls is 15.4 years.

3:05

1:02

3:04

2:03

the average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. the present age of the husband is-----------?

the average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years.

none of these

35 years

30 years

40 years

the average age of 15 students of a class is 15 years. out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. the age of the 15th student is------------?

the average age of 15 students of a class is 15 years.

14 years

15 2/7 years

11 years

15 years

the arithmetic mean of the scores of a group of students in a test was 52. the brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. the mean score of remaining 55% is-----------?

the arithmetic mean of the scores of a group of students in a test was 52.

51.4 approx.

45

50

54.6 approx.

rehman mixed 24 kg of butter at rs. 150 per kg with 36 kg butter at the rate of rs. 125 per kg. at what price per kg should he sell the mixture to make a profit of 40% in the transaction?

rehman mixed 24 kg of butter at rs. 150 per kg with 36 kg butter at the rate of rs. 125 per kg.

rs. 135

rs. 198

rs. 189

rs. 162

rayyan purchased a refrigerator and a mobile phone for rs. 15000 and rs. 8000 respectively. he sold the refrigerator at a loss of 4 percent and the mobile phone at a profit of 10 percent. overall he make a--------?

rayyan purchased a refrigerator and a mobile phone for rs. 15000 and rs. 8000 respectively.

profit of rs. 200

loss of rs. 100

profit of rs. 100

loss of rs. 200

ramees bought 4 dozen apples at rs. 12 per dozen and 2 dozen apples at rs. 16 per dozen. he sold all of them to earn 20%. at what price per dozen did he sell the apples?

ramees bought 4 dozen apples at rs. 12 per dozen and 2 dozen apples at rs. 16 per dozen. he sold all of them to earn 20%.

rs. 16.00

rs. 19.20

rs. 16.80

rs. 14.40

rajan borrowed rs.4000 at 5% p.a compound interest. after 2 years, he repaid rs.2210 and after 2 more year, the balance with interest. what was the total amount that he paid as interest?

rajan borrowed rs.4000 at 5% p.a compound interest. after 2 years, he repaid rs.2210 and after 2 more year, the balance with interest.

rs.675.50

rs.613.50

rs.653.50

rs.635.50

rahat purchased a refrigerator for rs. 12500 after getting a discount of 20% on the labelled priche spent rs. 125 on transport and rs. 250 on installation. at what price should it be sold so that the profit earned would be 10% if no discount was offered?

rahat purchased a refrigerator for rs. 12500 after getting a discount of 20% on the labelled priche spent rs. 125 on transport and rs.

rs. 17000

rs. 17600

rs. 15525

rs. 16500

raees credits 15 % of his salary in this fixed deposit account and spends 30 % of the remaining amount on groceries if the cash in hand is rs. 2380, what is his salary?

raees credits 15 % of his salary in this fixed deposit account and spends 30 % of the remaining amount on groceries if the cash in hand is rs.

rs. 4500

rs. 3500

rs. 4000

rs. 5000

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