Question
A bag contains 7 white balls, 5 black balls, and 4
orange balls. Two balls are drawn at random. Find the probability that the two balls are white.Solution
Number of ways of selecting two white balls = 7 C₂
Total number of balls = 7 + 5 + 4 = 16
Number of ways of selecting two balls = 16 C₂
Probability = 7 C₂ ÷ 16 C₂ = (7 × 6) ÷ (16 × 15) = 42 ÷ 240 = 7/20
5.5 × 3.2 × 2.3 = ?
What value will come in place of (?) question mark in the given expression.
17 × 15 – 48 ÷ 4 + 9² = ?
Find the value of.
( ∛ ∛ 343 )3 × ( ∛ ∛216 )3
(3984 ÷ 24) x (5862 ÷ 40) = ?
5555 ÷ 11 ÷ 5 = 100 + ?
18 * 9 + 25% of 120 + 50% of 200 = ?
Simplify the following expressions and choose the correct option.
18² + (27 ÷ 3) × 11 − 250 = ?
What will come in the place of question mark (?) in the given expression?
(20% of 820 – 56 + 11 × 8) 1/2 = ? – 62
Simplify the following expressions and choose the correct option.
√2116 + 152 ÷ 9 - 33
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