Statistics & Probability (IMO Mathematics Olympiad (SOF) Class 10): Questions 32  38 of 80
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 958 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 450.00 or
Question number: 32
» Statistics & Probability
Question
The mean of is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  All of the above 

Question number: 33
» Statistics & Probability
Question
One card is drawn from a wellshuffled deck of 52 cards the probability of neither a Club nor a king is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 34
» Statistics & Probability
Question
The mean of six numbers is 15. If one number is excluded, then their mean is 17, the excluded number is ________
Choices
Choice (4)  Response  

a.  7 

b.  4 

c.  1 

d.  5 

Question number: 35
» Statistics & Probability
Question
Two dice are thrown at a time. The probability that the difference of the numbers shown on the dice is 2 is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 36
» Statistics & Probability
Question
The mean of 20 observations is. if each observation is multiplied by 2, then what is the new mean?
Choices
Choice (4)  Response  

a.  60 

b.  30 

c.  70 

d.  50 

Question number: 37
» Statistics & Probability
Question
A box contains 40 balls of two different colours, out of which x are black. One ball is drawn at random. If 20 more black balls are put in the box, the probability of drawing a black ball now will be double that of the previous probability of drawing a black ball. Then, the value of x is ________
Choices
Choice (4)  Response  

a.  15 

b.  14 

c.  12 

d.  10 

Question number: 38
» Statistics & Probability
Question
A Motor maintains an average speed of 70 km/hr while going from P to Q and maintains an average speed of 85 km/hr while coming back from Q to P. the average speed of the motor is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

