Question
In a white box there are 7 red, 5 blue, and 8 black
marbles while in a black box there are 6 red, 9 blue, and 5 black marbles. One marble is drawn at random from the combined marbles of both boxes. Find the probability that it is a blue marble from the black box.Solution
Total marbles in white box = 7 + 5 + 8 = 20
Total marbles in black box = 6 + 9 + 5 = 20
Total marbles combined = 20 + 20 = 40
Probability marble is from black box = 20/40 = 1/2
Probability marble is blue given black box = 9/20
Required probability = (1/2) × (9/20) = 9/40
564.932 + 849.029 – 425.08 = 612.095 + ?
999.99 + 99.99 + 99= ?
A sum of ₹60,000 is invested at a compound interest rate of 'x%' per annum, compounded annually, and grows to ₹75,264 in 2 ye...
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.)...
³√? × 33.97 + 59.99 × 28.9 – 48.98 × 21.42 = 1085.344
1279.98 ÷ 40.48 × 10.12 = ? × 2.16
(124.901) × (11.93) + 219.95 = ? + 114.891 × 13.90
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.)...
