P(Ravi is rewarded Rs. 10) = 0.4
P(Ravi does not lose) = 0.7
P(Ravi pays a penalty) = 0.3
Step-by-step explanation:
Step 1 :
Probability of any event happening = Total number of favorable outcomes / Total number of outcomes
Step 2 :
(i) P (Ravi is rewarded Rs. 10) = P(Ravi selecting a white ball)
Total number of favorable outcomes = Total number of white balls = 4
Total number number of outcomes = 10
Probability of selecting a white ball = Total number of white balls/Total number of outcomes =4/10 = 0.4
Hence P (Ravi is rewarded Rs. 10) = 0.4
Step 3 :
(ii) P (Ravi does not lose)
Probability of Ravi not losing is probability of Ravi not selecting a Red ball [ because Ravi has to pay penalty only when he chooses red ball
P(Ravi selecting Red ball) = Total number of red balls/Total number of outcomes =3/10 = 0.3
Hence P (Ravi does not lose) = 1-0.3 = 0.7
Step 3 :
(iii)P (Ravi pays a penalty of Rs. 5)
P (Ravi pays a penalty of Rs. 5)= Ravi selecting a Red ball
P(Ravi selecting Red ball) = Total number of red balls/Total number of outcomes =3/10 = 0.3
Hence P (Ravi pays a penalty of Rs. 5) = 0.3
