I don’t think I can have any of my friends in
Answer:
26880 ways
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Step-by-step explanation:
Given



Required
Determine the number of ways 3 toppings and 3 cheese can be selected
The number of crusts to be selected was not stated. So, I'll assume 1 crust to be selected from 4.
This can be done in
ways
For the toppings:
3 can be selected from 10 in
ways
For the cheeses:
3 can be selected from 8 in
ways
Total number of selection is:

Apply combination formula:







<em>Hence, there are 26880 ways</em>
Greater than 50:
2 x (8 + 20 - 12 / 8) is 52
Less than 10:
2 x (8 +(20 - 12)) ÷ 6 is 5.33