Data & Probability — practice questions, page 9
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QuestionTwo fair dice are thrown together. What is the probability that the product of the two numbers…QuestionA city water board charges nothing for the first 10 kilolitres used in a month, ₹8 per kilolitre…QuestionFor a set of readings the lower quartile is 26 and the upper quartile is 38. A reading counts as…QuestionThe seven letters of the word BALLOON are arranged at random in a row. What is the probability…QuestionWhat is the mean of all the multiples of 7 that lie between 10 and 100?QuestionFor two events A and B it is given that P(A) = 0.6 and P(B) = 0.5. Which statement MUST be true?QuestionA box-and-whisker plot drawn for the marks of 60 students shows least mark 18, lower quartile 32,…QuestionA clerk worked out the mean of 20 readings and got 35. It later came to light that he had typed…QuestionStudents in a hostel are asked which month they were born in. What is the least number of students…QuestionA shoe shop's sales for one day were: size 5 — 4 pairs, size 6 — 9 pairs, size 7 — 11 pairs, size…QuestionA two-digit number is written down at random. What is the probability that its two digits add up…QuestionThe 'less than' cumulative frequencies of a distribution are: less than 10 — 6, less than 20 — 18,…QuestionThe ten values 4, 8, 11, 13, 16, 19, 22, 26, 31, 38 are already in ascending order. Taking Q1 as…QuestionA fête stall's wheel is split into four coloured sectors — red, blue, green and yellow. The red…QuestionThe mean of five consecutive odd numbers is 27. What is the largest of them?QuestionA box holds 12 chocolates, 4 of which have a nut filling. Riya eats one chocolate and then a…QuestionThe daily wages of 100 workers are grouped as — ₹200–300: 12 workers, ₹300–400: 25 workers,…QuestionFor the four numbers 2, 4, 6 and 8, by how much does the mean of their squares exceed the square…QuestionA fair die is rolled three times. What is the probability of getting at most one six?QuestionFive of the six numbers 23, 41, 17, 35, x and 29 are known. The range of the six numbers is 38,…QuestionOne of the numbers 1, 2, 3, … , 100 is picked at random. What is the probability that it is either…QuestionAt an inter-school meet, points are awarded 5 for a gold medal, 3 for a silver and 1 for a bronze.…QuestionA stall's takings on seven days were ₹320, ₹350, ₹360, ₹380, ₹400, ₹410 and ₹1,000. The owner…QuestionThe odds in favour of Team A winning its match are 2 : 3, and the odds in favour of Team B winning…QuestionThe five readings 7, 9, 12, 15 and 20 have median 12. Two further readings, 4 and 30, are added to…
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