that child is $10$ years old.

\frac{4}{25}

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\frac{6}{25}

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\frac{7}{25}

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\frac{8}{25}

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Solution

The correct option is C $\frac{8}{25}$
Total no. of childrens $= 3 + 8 + 20 + 15 + 6 + 12 + 18 + 11 + 22 + 17 + 15 + 10 + 13 + 10 + 10 + 10 = 200$

$P (C) = \frac{No. of children of age 10}{Total no. of childrens}$

$= \frac{22 + 17 + 15 + 10}{200} = \frac{64}{200} = \frac{8}{25}$

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Size	$2$	$3$	$4$	$5$	$6$	$7$	$8$
Frequency	$10$	$12$	$25$	$20$	$25$	$15$	$11$

Question 17

$(- 25) \times [6 + 4]$ is not same as

(a) $(- 25) \times 10$
(b) $(- 25) \times 6 + (- 25) \times (4)$
(c) $(- 25) \times (6) \times (4)$
(d) -250

Subtract without using number line:

(1) 40 from 50

(2) −20 from + 30

(3) −25 from −40

(4) +20 from −50

(5) +25 from −25

(6) −25 from + 25

(7) +40 − (−10) − (+20)

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