25 pupils

25 pupils attend the school dance group, which is 5 percent of all pupils in the school. The judo class is attended by 20 pupils of the school, a quarter of whom also go to a dance group. How many schoolchildren do not go to a dance or judo group?

Correct answer:

x =  450

Step-by-step explanation:

q=5%=5100=0.05  25=q n n=25/q=25/0.05=500  x=n252020/4=500252020/4=450



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