Question
A recent survey of married couples in Indian metro
cities showed that 20% of the couples have only one child, 45% of the remaining couples have two children, and the rest of the couples have three or more children. What is the percentage of couples with three or more children?Solution
Total number of couples = 100% So couples having only one child is 20% of 100% = 20/100 x 100 = 20 Remaining 100- 20 = 80 Now couples having two child is 45% of remaining, i.e. 80 x 45% = 80 x 45/100 = 36, Remaining left now = 80% - 36% = 44%.
If √3n 729, then the value of n is equal to:
Simplify the following expressions and choose the correct option.
18² + (27 ÷ 3) × 11 − 250 = ?
√144 × √121 + 25% of 600 = ? + 256
Simplify the following expression:-
What will come in the place of question mark (?) in the given expression?
? × 18 + 3072 ÷ 24 = 20% of 1900Â
Simplify the following expression:
  (525 +175) ² - (525 – 175) ² / (525 × 175)
? = 6.25% of 240 + 25 2 + 17 2 – 16 × 17
(8.4 × 6.5 ×2.52 )/(5.04 ×3.25 ×2.1) = ?
Simplify: 3/4 of 2½ + 2/3 of 1½
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