Question

(i) The mean for the following observations is 35. Find the values of a and b.
X : 5 15 25 35 45 55 65
F : 2 5 a 10 9 b 1
£f = 41
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Answer 1

Answer:

a + 4 = 3b

Step-by-step explanation:

Please refer to the attachment

Answer 2

mean =£ fixi /£fi

905+25a+55b/41=35

25a+55b=1435-905

5a+11b=106......(1)

a+b=14...... (2)

a=8,

b=6