2, 1
1, 2
1, 5
5, 2
Correct answer is C
Mean \(\bar{x}\) = \(\frac{\sum fx}{\sum f}\)
= \(\frac{5.2}{1}\)
= \(\frac{8 + 4y + 36 + 40}{4 + y + 6 + 5}\)
= \(\frac{5.2}{1}\)
= \(\frac{84 + 4y}{15 + y}\)
= 5.2(15 + y)
= 84 + 4y
= 5.2 x 15 + 5.2y
= 84 + 4y
= 78 + 5.2y
= 84 = 4y
= 5.2y - 4y
= 84 - 78
1.2y = 6
y = \(\frac{6}{1.2}\)
= \(\frac{60}{12}\)
= 5
What value of x will make the function x(4 - x) a maximum?...
If 23x = 325, find the value of x...
Find the average of the first four prime numbers greater than 10 ...
Which of the following is not a probability of Mary scoring 85% in a mathematics test? ...
If \(\sin\theta = \frac{12}{13}\), find the value of \(1 + \cos\theta\)...
If y = 23\(_{five}\) + 101\(_{three}\) , find y, leaving your answer in base two...