Question
A box contains 8 yellow marbles, ‘x’ blue marbles
and 12 white marbles. A box contains 5 yellow marbles, 2 blue marbles and 3 white marbles. The probability of drawing a blue marble at random from the box is 1/6. If (x/2) blue marbles from the box is transferred to the bag, then find the probability of drawing a blue marble and a white marble from the boxSolution
According to the question, x/(8 + x + 12) = 1/6 => 5x = 20 => x = 4 Therefore, number of blue marbles transferred to box = x/2 = 2 Total number of blue marbles in the bag after the transfer = 2 + 2 = 4 Total number of marbles in the box after the transfer = 5 + 2 + 3 + 2 = 12 Required probability = (4C1 × 3C1 )/12C2 = 2/11
A can finish painting a sari in 11 days, B in 20 days and C in 55 days, if they work independently. In how many days can the work be completed if A is a...
Consider the following statements:
(1) Article 21-A deals with the right to elementary education.
(2) The right to elementary education is...
Which day is observed as “World Tourism Day” every year?
Who prepared the first estimates of the national income of India in 1876?
Match List-1 (Person) with List-II (Organization) and select the correct answer using the code given below the lists:
List-I (Person)
The audit programme should include:
I. Verification of assets
II. �...
Electric devices like laundry iron, electric toaster, electric oven, electric kettle and electric heater are based on which effect of electric current?
Planets do not twinkle because:
Income of A is twice the income of B. B and A spend 60% and 70% respectively of their incomes. Find the savings of A, if B saves Rs. 15000 in a month.
Eight friends, A, B, C, D, E, F, G, and H are sitting around a square table facing the centre of the table. Four of them are sitting at the corners whil...
Relevant for Exams:
