IMO Mathematics Olympiad Class 7: Questions 863  867 of 965
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Question number: 863
Question
A coin is tossed 80 times and head is obtained 30 times. On tossing a coin at random, the probability of getting a head is ________.
Choices
Choice (4)  Response  

a.  0 

b.  1 

c. 


d. 


Question number: 864
Question
The value of , when and is ________.
Choices
Choice (4)  Response  

a.  0.004032 

b. 


c. 


d.  0.04132 

Question number: 865
Question
A die is tossed 50 times and the number 5 is obtained 25 times. Now, a dice is tossed at random, then the probability of getting the number 5 is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 866
Question
Calculate the area of the shaded region of the following figure. ABCD is a rectangle having length 40 cm, breadth 30 cm. E, F and G are midpoints of AB, CD and AD respectively.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 867
Question
The area of two circles are in the ratio 64: 81. Then the ratio of their circumference is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

