Question
36 pens are there in a box where 12 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/36 = 1/4 => p = 9 So, number of black pens = 36 – 12 – 9 = 15 Required ratio = 9 : 15 = 3:5
42, 54, 78, 114, 168, 222
What will be come in place of (?) in the given number series.
2, 6, 18, 54, ?, 486The median of the following distribution is:
The ratio of Pawan's income to Qureshi's income is 6:5. Pawan spends 75% of his income, while Qureshi saves 24% of his income. What percentage of Pawan'...
142.07 + 21.89 – (128.12 ÷ 7.81 – 12.09 × 6.98) = ?
A line with slope m touches the parabola y ² = 4ax. The equation of the tangent is:
A man spends 35% of his income on food, 25% on rent, and the remaining amount on other expenses. If he saves ₹9,000, which is 20% of his income, find ...
A man invests ₹20,000 in a scheme that offers a 10% simple interest per annum. After how many years will his total amount become ₹30,000?
24, 13, ?, 29, 117, 937
If cos A = 4/5 and A is an acute angle, find the value of 3 tan A + 4 sec A.
Relevant for Exams:
