Question

A 110m hurdle race is organised for a group of 150 athletes. The

time, in seconds, taken by the athletes to run the race are tabulated

below

Time(in

sec)

13.8-

14.0

14.0-

14.2

14.2-

14.4

14.4-

14.6

14.6-

14.8

14.8-

15.0

No of

athletes

2

4

5

71

48

20

1. What is the class mark of class interval corresponding to

frequency 48?

A)14.5 b) 14.7 c) 14.75 d)14.65

2. What will be the upper limit of the median class? a) 14.4 b)

14.2 c) 14.8 d) 14.6

3. Estimate the median time taken by athelete to finish the race a)

14.76 sec b) 14.58 sec c) 14.94 sec d) 14.44 sec

4. The mean time taken by an athelete is 14.6 sec, then the mode

of the given data is a) 14.54 sec b) 14.64 sec c} 14.94 sec d)

14.44 sec

5. How many athletes finished the hurdle race in less than 14.6

seconds? A) 71 b) 76 c) 82 d) 91

18. CASE STUDY BASED -2

In a city , the house of three friends,Rajat, Shweta and Alia are

located at A(7,5), B(2,3) and C(6,-7) respectively

1) The points A, B and C form which type of triangle?a)

scalene triangle (b) Equilateral triangle (c) Right angle

triangle (d) None of these

2) The area of A ABC is (a) 29 square units b) 32 square

units(C) 35 square units. d) 49 square units

3) Sanyam decides to take a house in the middle of the three

friends. The coordinates of the point where he can take a

house is a)(11/2, -2) b) (13/2, -1) c) (9/2, 4) d)​

Answer 1

Answer:

match the following

1.51/100. 8504cm

2.81/2. 0.15

3.5/6-4/6. square units

4.85m4cm. unit fraction

5.area. 8L500L