Question
40 pens are there in a box where 22 are red pens,
‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blue pen is 0.25. Find the ratio of the number of blue pens and black pens.Solution
Probability of getting a blue pen , => p/40 = 1/4 => p = 10 So, number of black pens = 40 – 10 – 22 = 8 Required ratio = 10 : 8 = 5:4
? = 650.24 + 1124.97 – 14.992
124% of 620.99 + 11.65% of 1279.23 = ?
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.)...
6527.83 - 4891.21 + 7423.46 + ? = 14520.34
20% of 80 × 26% of 65 = ?
185.92 ÷ 5.98 - (4.002)2 + 114.03 of 5.03 ÷ 18.99 of 6.04 = 5.01 of 2.99 + ? ÷ 12.02
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.)...
`sqrt623.798` × 24.034 +`sqrt403.898` × 17.907 =?
600.11 ÷ 14.98 x 5.14 – 171.9 = √?
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