The mean of 2, 5, (x + 2), 7 and 9 is 6. Find the median....
The mean of 2, 5, (x + 2), 7 and 9 is 6. Find the median.
5.5
6.0
6.5
7.0
Correct answer is D
\(\frac{2 + 5+ (x + 2) + 7 + 9}{5} = 6 \implies 25 + x = 30\)
\(x = 5 \therefore x + 2 = 5 + 2 = 7\)
Arranging the numbers in ascending order: 2, 5, 7, 7, 9.
Median = 7.0
Simplify \(\frac{1 - 2\sqrt{5}}{2 + 3\sqrt{2}}\)....
If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m...
If \(y = x^{3} - x^{2} - x + 6\), find the values of x at the turning point....
Find the minimum value of \(y = 3x^{2} - x - 6\)....
For what range of values of x is x\(^2\) - 2x - 3 ≤ 0...
Simplify: \(^{n}C_{r} ÷ ^{n}C_{r-1}\)...
\(f(x) = p + qx\), where p and q are constants. If f(1) = 7 and f(5) = 19, find f(3)....