Loading [MathJax]/jax/output/HTML-CSS/jax.js

Home / Aptitude Tests / Mathematics / If m and n are the m...

If m and n are the mean and median respectively of the set o...

If m and n are the mean and median respectively of the set of numbers 2, 3, 9, 7, 6, 7, 8, 5, find m + 2n to the nearest whole number

A.

19

B.

18

C.

13

D.

12

View answer & explanation

Correct answer is A

mean(x) = $\frac{\sum x}{N}$

= $\frac{48}{8}$

= 5.875

re-arranging the numbers;

2, 3, 5, 6, 2, 7, 8, 9

median = $\frac{6 + 7}{2}$

= $\frac{1}{2}$

= 6.5

m + 2n = 5.875 + (6.5)²

= 13 + 5.875

= 18.875

= $\approx$ = 19

See all Mathematics questions & answers

See more JAMB questions & answers

Similar Questions

Simplify $\frac{1}{x-3}-\frac{3(x-1)}{x^2 - 9}$ ...

A die has four of it's faces coloured white and the remaining two coloured black. What is the pr...

If 92x = $\frac{1}{3}$ (27x), find x...

Integrate (2x+1) $^3$ ...

Simplify (x - 3y)2 - (x + 3y)2...

In the diagram above, what is the size of angle ACB? ...

An aeroplane flies due north from airport P to Q and then flies due east R. If Q is equidistant from...

Factorise: 6x $^2$ + 7xy - 5y $^2$ ...

Consider the statements: p: Siah is from Foya. q: Foya is in Lofa. Write in symbolic for the stat...

Find the range of values of x which satisfies the inequality 12x2 < x + 1...

Aptitude Tests

Verbal Reasoning Questions and Answers

Spatial Reasoning Questions and Answers

Quantitative Reasoning Questions and Answers

Typing Speed and Accuracy Test

Puzzles Questions and Answers

Abstract Reasoning Questions and Answers

Logical Reasoning Questions and Answers

Data Interpretation Questions and Answers

Microsoft Office Questions and Answers

Numerical Reasoning Questions and Answers

Situational Judgement Questions and Answers

Nigeria General Knowledge Questions and Answers

Personality Test

View latest jobs in Nigeria today