NSTSE (National Science Talent Search Exam Unified Council) Class 9: Questions 646  654 of 2000
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Question number: 646
Question
If 3,7, 8 and 4 occur with frequencies 2,6, 7 and 3 respectively, then the arithmetic mean is
Choices
Choice (4)  Response  

a.  18  
b.  6.44  
c.  6.2  
d.  8 
Question number: 647
» Mathematics » Number Systems
Question
Which of the following statements is true?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 648
» Mathematics » Heron's Formula
Question
In a quadrilateral the sides are 8,15,13,18 units and the angle between first sides is a right angle. The area of quadrilateral is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 649
» Biology » Fundamentals Unit of Life
Question
Centrosome is present in
Choices
Choice (4)  Response  

a.  Mitochondria  
b.  Cytoplasm  
c.  ER  
d.  Nucleus 
Question number: 650
» Mathematics » Number Systems
Question
equals
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 651
Question
A bag contains 6 blue and 9 black balls. If a ball is drawn at random, the probability that the drawn ball to blue is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 652
» Mathematics » Number Systems
Question
The value of x from
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  All of the above 
Question number: 653
Question
The mean of 15 numbers is 35. If 5 is added to each of the first five numbers, then the mean of the new set of 15 numbers is
Choices
Choice (4)  Response  

a.  30  
b.  45.51  
c.  36.67  
d.  37 
Question number: 654
Question
If and , then the value of is:
Choices
Choice (4)  Response  

a.  704  
b.  407  
c.  470  
d.  308 