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Statistics and Probability

The mean of  ungrouped data and the mean calculated when the same data is grouped are always the same. Do you agree with this statement? Give reason for your answer.

08/11/2024

Mathematics

10th

Statistics and Probability

A school has five houses A, B, C, D and E. A class has 23 students, 4 from house A, 8 from house B, 5 from house C, 2 from house D and rest from house E. A single student is selected at random to be the class monitor. The probability that the selected student is not from A, B and C is

(A) 4/23 (B)6/23(C)8/23 (D)17/23

08/11/2024

Mathematics

10th

Statistics and Probability

One ticket is drawn at random from a bag containing tickets numbered 1 to 40. The probability that the selected ticket has a number which is a multiple of 5 is

(A) 1/5 (B)3/5 (C)4/5 (D)1/3

08/11/2024

Mathematics

10th

Statistics and Probability

A girl calculates that the probability of her winning the first prize in a lottery is 0.08. If 6000 tickets are sold, how many tickets has she bought?

(A) 40 (B) 240 (C) 480 (D) 750

08/11/2024

Mathematics

10th

Statistics and Probability

The probability of getting a bad egg in a lot of 400 is 0.035. The number of bad eggs in the lot is

(A) 7 (B) 14 (C) 21 (D) 28

08/11/2024

Mathematics

10th

Statistics and Probability

A card is drawn from a deck of 52 cards. The event E is that card is not an ace of hearts. The number of outcomes favourable to E is

(A) 4 (B) 13 (C) 48 (D) 51

08/11/2024

Mathematics

10th

Statistics and Probability

If P(A) denotes the probability of an event A, then

(A) P(A) < 0 (B) P(A) > 1 (C) 0 ≤ P(A) ≤ 1 (D) –1 ≤ P(A) ≤ 1

08/11/2024

Mathematics

10th

Statistics and Probability

The probability expressed as a percentage of a particular occurrence can never be

(A) less than 100 (B) less than 0(C) greater than 1 (D) anything but a whole number

08/11/2024

Mathematics

10th

Statistics and Probability

If the probability of an event is p, the probability of its complementary event will be

(A) p – 1 (B) p (C) 1 – p (D) 1-1/p

08/11/2024

Mathematics

10th

Statistics and Probability

An event is very unlikely to happen. Its probability is closest to

(A) 0.0001 (B) 0.001 (C) 0.01 (D) 0.1

08/11/2024

Mathematics

10th