Question

xi	fi	fixi
4	10	A ______
8	11	B ______
12	9	C ______
16	13	D ______
		`sumf_ix_i =` ______

Find the value of `sumf_ix_i`

Options

• 208

• 444

• 88

• 40

Answer 1

444

Explanation:-

Each term on right most column is the product of corresponding 2 terms on 1^st 2 columns. 1^st column is class marks list. 2^nd column is frequencies for these columns. The 3^rd column is the product of these 2 columns.

For first row, class mark (x_i) = 4, frequency (f_i) = 10. Product (f_ix_i) = 40. Similarly, the products of other class marks can also be found.

xi	fi	fixi
4	10	40
8	11	88
12	9	108
16	13	208
		`sumf_ix_i =444`

The sum of these products `sumf_ix_i = 40 + 88 + 108 + 208 = 444`