IMO- Mathematics Olympiad Class 10: Questions 468 - 473 of 889

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Question number: 468

» Statistics & Probability

MCQ▾

Question

The average temperatures of Tuesday, Wednesday and Thursday was 42 . The average temperature of Wednesday, Thursday and Friday was 47 . If the temperature on Tuesday was 43 , then the temperature on Friday was ________.

Choices

Choice (4) Response
a.

58

b.

53

c.

50

d.

49

Question number: 469

» Statistics & Probability

MCQ▾

Question

The algebraic sum of the deviations of a frequency distribution from its mean is ________

Choices

Choice (4) Response
a.

A non-zero number

b.

Always negative

c.

Always positive

d.

0

Question number: 470

» Statistics & Probability

MCQ▾

Question

The mean of 10 observations is 5.5 . if each observation is multiplied by 2, then what is the new mean?

Choices

Choice (4) Response
a.

16

b.

15

c.

11

d.

17

Question number: 471

» Coordinate Geometry

MCQ▾

Question

The distance between the points (acosθ+bsinθ,0)and(0,asinθbcosθ) is ________

Choices

Choice (4) Response
a.

a2+b2

b.

a2+b2

c.

a+b

d.

a2b2

Question number: 472

» Coordinate Geometry

MCQ▾

Question

If J(3,0),K(4,1)andL(5,2) are the midpoints of the sides of MNO , the area of the triangle is ________

Choices

Choice (4) Response
a.

55 sq. units

b.

35 sq. units

c.

29 sq. units

d.

44 sq. units

Question number: 473

» Coordinate Geometry

MCQ▾

Question

The coordinates of the mid-points of the sides of a triangle are (2,7),(5,5)and(8,9) . What will be the coordinates of the centroid of the triangle?

Choices

Choice (4) Response
a.

(7,5)

b.

(5,7)

c.

(5,7)

d.

(5,7)

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