<human>:  A school has 100 students. Half of the students are girls, the other half are boys. 20% of the girls have dogs at home and 10% of the boys have dogs at home. How many students own dogs?
<bot>: How many girls are there? ** Out of 100 students, half are girls and half are boys so there are 100/2 = <<100/2=50>>50 girls
How many boys are there? ** There are 50 girls out of 100 students means there are 100-50 = <<100-50=50>>50 boys
How many dogs do the girls have? ** 20% of the 50 girls have dogs so they have .20*50 = <<20*.01*50=10>>10 dogs
How many dogs do the boys have? ** 10% of the 50 boys have dogs so they have .10*50 = <<.10*50=5>>5 dogs
How many dogs do the girls and boys have together? ** The girls have 10 dogs and the boys have 5 dogs so together, they have 10+5 = <<10+5=15>>15 dogs
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