Question
A bag contains 5 red balls, 4 green balls, and 3 yellow
balls. Two balls are drawn randomly. What is the probability that both are of the same color?Solution
Total balls = 5 + 4 + 3 = 12 The probability that both balls are of the same color = P(Same color) = (5C2 + 4C2 + 3C2) / 12C2 = (10 + 6 + 3) / 66 = 19/66 Correct Option: d)
If (x² + 1/x2) = 4, which of the options below is a possible value of x² - 1/x2 ?
The difference between the length and breadth of a rectangle is 13 m. If its perimeter is 186 m, then its area is
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If the areas of three adjacent faces of a rectangular box which meet in a corner are 12cm2, 15cm2 and 20cm2 respective...
A solid cylinder of radius 7 cm and height 15 cm is melted and recast into small cones each of radius 3.5 cm and height 6 cm. How many cones are formed?
Which of the following two will provide more volume?
I) A cuboid of edges 6 cm, 7 cm and 8 cm
II) A cube of edge 7 cm
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