The average score of a batsman in x innings
is 36. After another innings of 80, his average increases by 4. Find x + 1. .
The average of three consecutive odd numbers
is 16 more than one-third of the largest of the three numbers. Find the
smallest of the three numbers. .
The average of five consecutive even numbers
is 2n. If the next five even numbers are included then the average of ten
numbers will increase by .
The average of 27 observations was calculated
as 131. It was later found that two observations, 41 and 52 were mistaken as 14
and 25. Find the correct average of the 27 observations. .
In a state the average rainfall in the months
of June, July and August is 17 cm. And the average rainfall in the months of
August, September and October is 18.2 cm. If the average rainfall for the five
months from June to October is 17.8 cm. Then the average rainfall in the month
of August is .
(a) 14.2 cm .
(b) 15.4 cm .
(c) 16.6 cm .
(d) 17.8 cm .
The present average age of a committee of
eight members is the same today as it was four years ago since an old member
has been replaced by a young member. How much older is the old member than the
young member? .
(a) 28 years
(b) 4 years
(c) 16 years
(d) 32 years
The average (arithmetic mean) of 8
observations is 17. If one more observation is included among them, the average
of all the observations will be 18. The value of the included observation will
In a certain season, a cricket player played
a total of 38 innings. his average score per innings that season was 40. His
score in his first innings was 80 less than his score in his last innings. If
these two innings are not considered his average score in the season would be
39. Find his score in his last innings. .
A mixture contains sand and flour in the
ratio of 4 : 1 and another mixture contains the same substances in the ratio of
5 : 2. How many kgs of sand and flour from the former mixture should be added
to 7 kg of the latter mixture to make the ratio 3 : 1? .
(a) 4 kg
(b) 5 kg
(c) 7 kg
(d) 8 kg
A trader, who claimed to sell milk at cost
price, mixes it with water and makes a profit of 25%. Find the concentration of
milk in the mixture. .