Math, asked by priyapatil0754, 10 hours ago

Q. For the following frequency distribution value of Q2 is 22, find the missing frequency.

Class ----Frequency
0-10 ------- 5
10-20 -------8
20-30 -------?
30-40 -------4
40-50 ----_-3​

Answers

Answered by vpranavi
1

Answer:

X = 12

Step-by-step explanation:

Solution - 

  C.I |0-10 |10-20 | 20-30  |30-40 | 40-50

  Frequency |8 |  X  | 10  | 11 |  9. 

 Midvalue5  | 5  | 15 | 25 | 35 |  45

Mean = 25.2

8×5+15x+10×25+11×35+9×45=25.2

--------------------------------------------------

8+x+10+11+9

1080+15x=957.6+25.2x

x=10.2122.4

x=12.

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