Question

the mark is obtained by 5 student is 162 .if the marks is obtained by 4 student of them are170 , 184, 190 and 142 find the marks is obtained by 5th student
​

Answer 1

Answer:

Marks f

i

x

i

f

i

x

i

40−50 6 45 6×45=270

50−60 12 55 12×55=660

60−70 14 65 14×65=910

70−80 8 75 8×75=600

80−90 6 85 6×85=510

90−100 4 95 4×95=380

Σf

i

=50 Σf

i

x

i

=3330

Arithmetic mean using direct method formula is

x

=

Σf

i

Σf

i

x

i

x

=3330/50=66.6

Answer 2

Answer:

124

Step-by-step explanation: