Question
The mean of 15 observations is 124 and the median of the
observations is 130. Find the mode of the observations.Solution
Mean of 15 observations = 124
Median of 15 observations = 130
Since,
Mode = 3*median - 2*mean
= 3*130 - 2*124 = 390 – 248 = 142
The ratio between the length and breadth of a rectangular board is 7:5. If the breadth of the board is 20.5cm, find the length in cm.
28 percent of a number and 40 percent of another number are in the ratio 7: 8. What is the ratio of 50 percent of the first number to 75 percent of the ...
The ratio of number of girls to number of boys is 3 : 2 in a class of 60 students. The average marks scored by the boys in Physics is 72 and the average...
In a class, the number of students studying English and Math is in the ratio 3:4. If 12 additional students join the Math group, the ratio of students s...
120 cookies were distributed among 20 students in a class such that each boy gets 8 cookies and each girl gets 4 cookies. Find the number of boys in the...
In an orchard, the ratio of the number of mango and lichi trees is 4:7, respectively. Also, there are few apple trees in the orchard which is 50% more t...
A certain amount was divided among four people P, Q, R and S such that the amount obtained by S is 12.5% more than the amount obtained by Q. The amount ...
Ratio of runs scored by A, B and C is 3:10:8, respectively. Total number of runs scored by the team is 480, which is four times the runs scored by B. Fi...
The ratio of two numbers 'a' and 'b' is 6:2, respectively. Whereas the ratio of 'b' and 'c' is 10:11, respectively. When 14 is added to 'a', it becomes ...
- Rs. 36000 is shared among 'Pawan', 'Qureshi' and 'Raju' such that 'Pawan' receives (3/5) of what 'Qureshi' gets and (3/2) times of what 'Raju' gets. What i...
