Statistics & Probability (IMO- Mathematics Olympiad Class 10): Questions 18 - 23 of 80

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Question number: 18

» Statistics & Probability

MCQ▾

Question

A Bus maintains an average speed of 50 km/hr while going from A to B and maintains an average speed of 80 km/hr while coming back from B to A. the average speed of the bus is ________.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 19

» Statistics & Probability

MCQ▾

Question

A bag contains 5 Green, 4 Aqua, 9 Blue and 6 purple marbles. If a marble is drawn at random from the bag, the probability that the marble drawn is Aqua or Purple, is ________

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 20

» Statistics & Probability

MCQ▾

Question

In a single throws of a die, the probability of getting a multiple of 3 is ________

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 21

» Statistics & Probability

MCQ▾

Question

If Equation occur with frequencies Equation respectively, then the arithmetic mean is ________

Choices

Choice (4) Response

a.

125

b.

111

c.

120

d.

115

Question number: 22

» Statistics & Probability

MCQ▾

Question

The mean of 11 observations is 30. If the mean of the first 6 observations is 40 and that of the last 6 observations is 44, then the Sixth observation is ________

Choices

Choice (4) Response

a.

174

b.

128

c.

137

d.

131

Question number: 23

» Statistics & Probability

MCQ▾

Question

The mean weight of a class of 24 students is Equation kg. if the weight of the teacher is included, the mean rises by 400 g. Then the weight of the teacher is ________

Choices

Choice (4) Response

a.

55 kg

b.

45 kg

c.

65 kg

d.

50 kg

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