Data & Probability — practice questions, page 11
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QuestionTwelve readings, already in ascending order, are 5, 8, 11, 13, 14, 18, 21, 24, 27, 30, 34, 41.…QuestionA team of 4 is chosen at random from the 9 students of a club, and then one of the four chosen…QuestionA flight leaves Dubai at 21:10 local time and lands in Delhi at 02:15 the next morning, Indian…QuestionEvery employee of a firm is given the same flat raise of ₹1,500 a month. Before the raise the mean…QuestionThe five digits of 12345 are shuffled at random to make a new five-digit number, every digit being…QuestionThe scores of 50 candidates are given as a 'less than' table — less than 10: 4, less than 20: 12,…QuestionOne of the twelve months of the year is chosen at random. What is the probability that it has…QuestionIn a school 40 percent of the students pay a monthly fee of ₹1,200, another 35 percent pay ₹900…QuestionA jar starts with 5 red and 3 green beads. A bead is taken out at random, and it is then dropped…QuestionA club wants to display how its total yearly expenditure of ₹1,20,000 was shared among five heads…QuestionWhat is the median of the first 15 multiples of 4?QuestionTwo events A and B are independent, with P(A) = 0.4 and P(B) = 0.25. Find P(A or B).QuestionIn a school election four candidates polled these votes — A: 280, B: 210, C: 140, D: 70. Which…QuestionThe data 3, 5, 7, 7, 9, 9, 9, 11 is to be changed by writing in some extra 7s and nothing else.…QuestionDevika has scored 62, 71, 78 and 85 in four tests and will write one more. What is the LOWEST…QuestionThe marks of 400 candidates are given as a 'less than' table — less than 20: 40, less than 40:…QuestionA factory's records show that 3 items in every 250 produced are defective. In a consignment of…QuestionSeven tosses of a fair coin are made one after another. What is the probability that heads come up…QuestionA data set consists of several different positive numbers. Which one of these changes leaves the…QuestionA housie ticket number is drawn at random from the numbers 1 to 90. What is the probability that…QuestionA family with a monthly income of ₹48,000 records its spending as — Rent ₹14,400, Food ₹12,000,…QuestionA selection has three rounds. A candidate clears them independently with probabilities 0.8, 0.75…QuestionFor which of these data sets are the mean, the median and the mode all equal?QuestionTwo hundred and fifty shoppers were recorded by age and by how they paid. Under 25: cash 30, card…QuestionA three-digit number is written down at random, every three-digit number being equally likely.…
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