Probability 2955

There are 18 girls and 13 boys in the class. Four pupils will be chosen by lot to supervise the breaks. What is the probability that it will be the boys themselves?

Correct answer:

p =  0.0227

Step-by-step explanation:

p=13 12 11 10/(18+13)/(18+12)/(18+11)/(18+10)=0.0227

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