Question
There are ‘x’ white balls and 5 black balls in a
jar. If the probability of picking a white ball is 2/3, then calculate the probability that the two chosen balls are not of the same colour.Solution
ATQ, Total balls = x + 5 So, x/(x + 5) = 2/3 Or, 3x = 2x + 10 So, x = 10 Desired Probability = (10C1 × 5C1)/(15C2) = (2 × 10 × 5)/(15 × 14) = 10/21
Solve the following expression and calculate the approximate value.
802 of
9.95% of 1299.99 + 19.95 × 17.05 - 299.99 = ?
Find the approximate value of Question mark(?) for given equation.
(563.84 ÷ 11.92) × 15.08 + 244.95 = ? × 10.01
? = 41.92% of 49.96% of (45.07 1.97 – 4.98 2.03 )
`(13.022)^(2)+ (42.93)^(2)-(53.125)^(2)+(192.33xx14.88)=?- (88.44)^(2)- (42.03 xx 23.12)`
(22.93 × 11.92) + (17.78 ÷ 3.01) - (14.88 × 5.01) = ?
A bag contains 25 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, fin...
- 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.)
45.45 × 11.67 + 14399.88 ÷ 8.01 + 124.79 = ?
In a cyclic quadrilateral ABCD, angle A = 70 degrees and angle B = 100 degrees. What is the measure of angle C?
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