He bought 3 small notebooks (3*7=21) and 3 large notebooks (3*10=30)
21+30=51
I'm thinking you would have to add the probabilities that you choose a boy with you choose someone in the science club minus a boy in the science club. You can't count these people twice.
I'm getting 59%
(11+10-2)/32
The answer is 29/34 your answer
125% maybe i don’t know for sure
Answer: -5.2
Step-by-step explanation: