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Q.

A girl calculates that the probability of her winning the first prize in a lottery is 0.08. If 6000 tickets are sold, how many tickets has she bought?


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a

360

b

4800

c

480

d

400 

answer is C.

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Detailed Solution

Given that, a girl calculates that the probability of her winning the first prize in a lottery is 0.08.
Let us assume that P(A) is the probability of an event “A”, n(S) is the total number of events in the sample space and n(A) is the number of favorable outcomes. So we have,
P A =0.08  
She has sold 6000 tickets, so:
n S =6000  
As P A = n A n S  , the number of tickets she bought is, n A =n S ×P A  .
Question ImageTherefore, option 3 is correct.
 
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