Question

Find the mean x =10 30 50 70 89 f= 7 8 10 15 10

Answer 1

here is your answer hope it helps.......

Answer 2

The mean is  55

Step-by-step explanation:

Given;

x                          y                              xy

10                         7                             70

30                        8                             240

50                        10                            500

70                        15                            1050

89                        10                            890

Now as we know the mean is given by

$\overline{x} = \dfrac{\sum f_ix_i}{\sum f_i}$

Therefore we have

$\overline {x} = \dfrac{70+240+500+1050+890}{7+8+10+15+10} =\dfrac{2750}{50} =55$

Hence the mean is 55

#Learn more

Find the mean of a -1, a, a + 1

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