Question
A bag contains 9 white balls, 6 black balls, and 3 green
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 = 9Câ‚‚
Total number of balls = 9 + 6 + 3 = 18
Number of ways of selecting two balls = 18 Câ‚‚
Probability = 9 C₂ ÷ 18 C₂ = (9 × 8) ÷ (18 × 17) = 72 ÷ 306 = 4/17
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
?2 = √20.25 × 10 + √16 + 32
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
42 * 7 * 64 * 11 * 6 *4
276 ÷ 11.5 + 12 = ? x 3
? = 20% of 1200 + 256
?2 + 114 - 48 ÷ 2 × 5 = 163
Find the simplified value of the given expression:
7 of 9 ÷ 3 × 5² + √81 – 1448% of ? = 10176
35% of 500 × 22% of ? = 847
5(? + 2)Â =Â 3125Â
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