Question
In a basket, the ratio of the number of yellow and black
marbles is 4:5, respectively, and the ratio of black to white marbles is 5:6. If the total number of marbles in the basket is 105, then how many black marbles are there?Solution
ATQ,
Let the number of yellow marbles = 4z Then, number of black marbles = (5/4) × 4z = 5z And, number of white marbles = (6/5) × 5z = 6z According to the question, 4z + 5z + 6z = 105 Or, 15z = 105 Or, z = (105/15) = 7 So, number of black marbles = 5z = 5 × 7 = 35
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.)...
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