Question

The mean of the following data is 50. Find 'a' and the frequencies for xi- 30 & xi- 70. *
4,23,17
6,33,31
5,28,24
2,13,3



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Answer 1

Answer:

answer is 5,28,24 is yourfull answer

Answer 2

Answer:-

Class interval x

i

Frequency

(f

i

) f

i

x

i

50-70 60 18 1080

70-90 80 12 960

90-110 100 13 1300

110-130 120 27 3240

130-150 140 8 1120

150-170 160 22 3520

Σf

i

=100 Σf

i

x

i

=11220

mean=

Σf

i

Σf

i

x

i

=

100

11220

=112.20

I hope this helps u