MathematicsProbability (NTSE Stage1 (StateLevel) ScholasticAptitude & Language Comprehension): Questions 7  12 of 13
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Question number: 7
» Mathematics » Probability
Question
A bag contains 20 balls out of which x are black. If 10 more black balls are put in the box, the probability of drawing a black ball is double of what it was before. The value of x is
Choices
Choice (4)  Response  

a.  40 

b.  10 

c.  5 

d.  0 

Question number: 8
» Mathematics » Probability
Question
In a single throw of a dice, what is the probability of getting a number greater than 4?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 9
» Mathematics » Probability
Question
If a carton containing a dozen mirrors is dropped which of the following cannot be the ratio of the broken mirror to unbroken mirror?
Choices
Choice (4)  Response  

a.  1: 1 

b.  3: 2 

c.  1: 2 

d.  5: 1 

Question number: 10
» Mathematics » Probability
Question
From 1 to 100 numbers, 3 numbers are selected at random, what is the probability that the numbers selected will have an odd sum?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 11
» Mathematics » Probability
Question
A coin is tossed 5 times. What is the probability of getting number of heads more than the number of tails?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 12
» Mathematics » Probability
Question
What is the probability of getting at least one head when two coins are tossed simultaneously?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

