Question
A bag contains (K - 2) red balls, 8 black balls, and 14
blue balls. If two balls are drawn randomly, the probability that both are black is 2/27. Calculate 180% of the difference between the number of red and blue balls.Solution
Let total number of balls in the bag = a So according to question, 8C2 / aC2 = 2/27 (8 x 7) / a x (a – 1) = 2/27 So, a x (a – 1) = 28 x 27 So total number of balls in the bag = 28 balls So number of red balls = 28 – (14 + 8) = 6 Required value = 180% x (14 – 6) = 14.4 Hence answer is option E
In 1898, which one from the following chemist discovered neon by cooling a sample of air to a liquid state, heating the liquid and capturing gases upon ...
Name the highest peak in Kerala.
When did the Simon Commission arrive in India?
What will be the average kinetic energy per molecule in Sl units for an ideal gas at a temperature of 25°C?
According to the Census of India 2011, ________ has the highest sex ratio of 1084 females per 1000 males.
Which of the following countries is the largest producer of milk?
_______ is the irrigation method suitable for undulating lands and sandy soils.
What is the total railway track length in India?
Which is the jet stream that brings Western disturbances in India?
When was the 1st Asian Kabaddi Championship held?
