SOLUTION: THE REPORT OF A WEATHER BUREAU ON THE FORECAST OF THE NUMBER OF TYPHOONS ENTERING COUNTRY'S AREA OF RESPONSIBILITY IS MANIFESTED IN THE FOLLOWING PROBABILITY DISTRIBUTION. WHICH OF

Algebra ->  Probability-and-statistics -> SOLUTION: THE REPORT OF A WEATHER BUREAU ON THE FORECAST OF THE NUMBER OF TYPHOONS ENTERING COUNTRY'S AREA OF RESPONSIBILITY IS MANIFESTED IN THE FOLLOWING PROBABILITY DISTRIBUTION. WHICH OF      Log On


   

Question 1180783: THE REPORT OF A WEATHER BUREAU ON THE FORECAST OF THE NUMBER OF TYPHOONS ENTERING COUNTRY'S AREA OF RESPONSIBILITY IS MANIFESTED IN THE FOLLOWING PROBABILITY DISTRIBUTION. WHICH OF THE FOLLOWING THE AVERAGE NUMBER OF TYPHOONS ENTERING THE COUNTRY.
NO.OF TYPHOONS (X) 0,1,2,3,4
P(X) 0.10,0.15,0.20,0.35,0.20
A.0.4 B.1.4 C.2.4 D.3.4
Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
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It is mathematical expectation


    E = sum%28X%2AP%28X%29%2C+X=0%2C+4%29 = 0*P(0) + 1*P(1) + 2*P(2) + 3*P(3) + 4*P(4) = 0*0.10 + 1*0.15 + 2*0.20 + 3*0.35 + 4*0.20 = 2.4.    ANSWER

Solved.

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Every student must know how to calculate it.

It is a basic,  like   2*2 = 4   in   Arithmetic.