Die mate van sukses van die Fana-sokkerspan hang van 'n aantal verskillende faktore af - NSC Mathematics - Question 11 - 2017 - Paper 1
Question 11
Die mate van sukses van die Fana-sokkerspan hang van 'n aantal verskillende faktore af. Die fiksheid van die spelers is een van die faktore wat die uitslag van 'n we... show full transcript
Worked Solution & Example Answer:Die mate van sukses van die Fana-sokkerspan hang van 'n aantal verskillende faktore af - NSC Mathematics - Question 11 - 2017 - Paper 1
Step 1
Calculate P(F and W)
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Answer
To find the probability that the team wins given that all the players are fit:
The probability that all the players are fit is given as P(F)=0.7.
If all the players are fit, the probability of winning the next match is P(W∣F)=0.85. Thus:
P(F and W)=P(F)×P(W∣F)=0.7×0.85=0.595
Step 2
Calculate P(not F and W)
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Next, we calculate the probability that not all players are fit and they still win:
The probability that not all the players are fit is P(notF)=0.3.
The probability of winning given that not all players are fit is P(W∣notF)=0.45. Thus:
P(notF and W)=P(notF)×P(W∣notF)=0.3×0.45=0.135
Step 3
Calculate Total Probability of Winning
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Answer
Finally, we use the law of total probability to find the overall chance of winning:
P(Win)=P(F and W)+P(notF and W)
Substituting the calculated values:
P(Win)=0.595+0.135=0.76
Therefore, the overall probability that the Fana-sokkerspan wins the next match is 76%.