28/03/2020Probability(Senior Class Maths Study by Topics) 0Comments by Gate Academy Welcome to your Probability(Senior Class Maths Study by Topics) NAME EMAIL PHONE NUMBER 1. A photograph is to be taken of five people including a married couple. If the married couple insist on sitting next to each other, the number of different arrangements is604824122. A bag contains 6 red balls, 12 white balls and 9 green balls.A ball is selected at random. What is the probability that it is a red or green ball?4/95/91/32/33. Of the 30 students in a class, 8 surnames begin with A or O and 18 begin with a consonant. No surname begins with any of the letters C,Q,U, V,X,Y and Z.The probability that the surname of a student selected at random begins with a vowel is2/152/54/154/134. A bag contains only Berries and Apples.The probability of picking a Berry at random is 0.3. Find the ratio of number of Berries to number of Apples that could be in the bag4:95:74:73:75. A box contains 5 blue balls, 3 black balls and 2 red balls of the same size. A ball is selected at random from the box and then replaced. A second ball is then selected. Find the probability of obtaining one black and one red ball in any order3/53/252/53/76. The probability of obtaining a number less than 5 in a single toss of a fair die is1/22/31/61/37. A die is rolled 100 times with the following outcomes:Number 1 2 3 4 5 6Frequency 15 20 18 14 17 16The experimental probability of obtaining at most 4 is0.140.840.470.678. Two dice, one red and the other blue are rolled together. Find the probability of obtaining a total score greater than 103/44/71/121/29. The probability of an event X is 2/3 and that of another event Y is 1/4. If the probability of either X or Y is3/41/311/12110. The data below shows the number of students that represented a Government Secondary School in a Mathematics Competition Find the probability that a student picked at random is in SS14/128/258/454/2511. A letter is chosen at random from the alphabet.Find the probability that it is T or H4/131/21/1310/1312. Cards are drawn from a pack of 52 playing cards one at a time. Calculate the probability of drawing without replacement at least one red card31/10277/1021/10217/10213. A letter is chosen at random from the alphabet. Find the probability that it is either in the word WHITE or in the word RANDOMLY1/21/1310/134/1314. A bag contains 6 red balls, 12 white balls and 9 green balls. A ball is selected at random. What is the probability that it is a green ball?4/92/31/35/915. The table below shows the frequency distribution of marks obtained by 40 students in a testIf a student is selected at random, find the probability that he scored 6 marks1/87/827/401/416. Two dice, one red and the other blue are rolled together. Find the probability of obtaining a total score divisible by 31/51/31/41/217. A container has 32 blue pens, 28 black pens and 20 red pens. If a pen is selected at random, what is the probability that it is not a red pen?1/201/2011/203/418. A bag contains 6 red balls, 9 blue balls and 5 green balls.Two balls are chosen one after the other with replacement. What is the probability that one is blue, the other is green?19/1009/1007/5027/10019. In how many different ways can the letters of the word GEOLOGY be arranged in order?1,2602,5205,04072020. The table below shows the frequency distribution of marks obtained by 40 students in a testIf a student is selected at random, find the probability that he scored at least 7 marks1/427/401/87/821. Two events M and N are mutually exclusive and P(M) = ¼ and P(N) = 2/3.P(M∪N) is1/21/12111/1222. Three balls are drawn one after the other, without replacement from a bag containing 4 blue, 6 white and 5 red identical balls.The probability of picking 2 blue and 1 red ball is8/2732/914/2256/9123. The letters of the word MISSISSIPPI are cut and placed in a bag. If one letter is drawn randomly from the bag, the probability that it is neither an I nor a S is1/26/113/118/1124. A number is selected randomly from the set of integers 1 to 20 inclusive. The probability that the number is prime is9/202/57/201/225. Two dice, one red and the other blue are rolled together. Find the probability of obtaining a total score of 71/51/61/41/326 out of 25Time is Up!