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In school A, Let number of students and teachers be 5x and 3x respectively. Now, 5x – 3x = 400 => x = 200 Total number of students = 5x = 1000 Total number of teachers = 3x = 600 Now, 2a = 1000 => a = 500 In school B, Let number of students and teachers be 7x and 9x respectively. Now, 9x – 7x = 320 => x = 160 Total number of students = 7x = 1120 Total number of teachers = 9x = 1440 Now, b + 340 = 1120 => b = 780 In school C, Here, m = 90 => n – m = 160 [n > m given] => n – 90 = 160 => n = 250 Total number of students = 90 Total number of teachers = 250 In school D, Let number of students and teachers be 4x and 5x respectively. Now, 5x – 4x = 100 => x = 100 Total number of students = 4x = 400 Total number of teachers = 5x = 500 Now, c2 = 400 => c = 20 Required answer = (250 + 20)/2 = 270/2 = 135
12 Marbles and 12 balls are kept in a box. If 4 items are chosen at random, Find the probability that 2 is a marble and another 2 is ball
A box contains 13 black and 13 white balls. The probability of drawing two balls of the same colour is?
A box contains 5 white, 6 green, 3 red, and 5 yellow marbles. If three marbles are chosen randomly, what is the probability that all three selected marb...
A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
In a container holding 18 balls of three shades – orange, purple, and white – the probability of picking an orange ball is 1/3. If the count of whit...
An instructor has a question bank consisting of 200 easy True / False questions, 300 difficult True / False questions, 400 easy multiple-choice question...
Roger Federer play 3 sets of a tennis match. The probability of his winning the three sets are 1/9,1/4,3/4 respectively. What is the probability that he...
One five letter word is to be formed taking all letters – U, Z, M, O and Q. What is the probability that this is word formed will contain all vowe...
The probability that Leah will be accepted into program P is 60% and into program Q is 40%. Leah prefers program 'P' first, then 'Q', and finally 'R'. A...
Determine the number of ways to form a Kabaddi team consisting of six players from a group of 7 male players and 5 female players. Specifically, calcula...
