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Let the total number of students in a class be x ∴ According to the question, Number of girls = 1/3 x and number of boys = x - 1/3 x = 2/3 x Number of girls who are absent = 3/5 ×1/3 x Thus, girls present = 2/5 ×1/3 x = 2/15 x Number of boys who are absent = 1/5 ×2/3 x Thus, boys present = 4/5 ×2/3 x= 8/15 x Total present = 2/15 x+ 8/15 x= 10/15 x= 2/3 x
A bag contains 20 black and 22 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...A bag contains cards numbered between 33 and 102. If one card is drawn from the bag, the probability that the number on the drawn card is a perfect squa...
A bag contains 10 red books, 7 yellowbooks and 7 greenbooks . 3books are drawn randomly. What is the probability that the
A coin is tossed 9 times. Find the probability of almost 2 tails.
A person wanted to visit four places Chennai, Bangalore, Delhi, and Mumbai in one trip. Find the probability of the person visiting Chennai immediately ...
In a box there are 3 red, 6 blue, and 9 yellow cards. One card is picked up randomly. What is the probability that it is neither red nor yellow?
The names of 8 students from section A, 9 students from section B and 10 students from section C were selected. The age of all the 27 students was diffe...
Three cards are drawn one after another with replacements from a pack of cards. What is the probability of getting the first card a Jack, the second car...
A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the...
A bag contains 15 black balls, 25 white balls, and 20 yellow balls. If three balls are drawn at random with replacement, what is the probability of draw...
