You know that 15% of a number n is 12. how can you use this to find 30% of n? 45% of n? explain. because 30% of n is equal to [ ] times 15% of n and 45% of n is equal to [ ] times 15% of n, you can write 30% of n=[ ] ×12= [ ] and 45% of n= [ ] ×12= [ ]

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Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?