Alvin is selling his marble set. He has 100 marbles. 20% are white, 30% are black, and the rest are different colors. He sells the white ones for a nickel each, the black ones for a dime each, and the colors for $0.20 each. How much does he earn?
How many white marbles does Alvin have? ** He has 20 white marbles because 100 x .2 = <<100*.2=20>>20
How many black marbles does Alvin have? ** He has 30 black marbles because 100 x .3 = <<100*.3=30>>30
How many color marbles does Alvin have? ** He has 50 color marbles because 100 - 20 - 30 = <<100-20-30=50>>50
How much does Alvin earn from white marbles? ** He earns $1 from white marbles because 20 x .05 = <<20*.05=1>>1
How much does Alvin earn from black marbles? ** He earns $3 from the black marbles because 30 x .1 = <<30*.1=3>>3
How much does Alvin earn from colors? ** He earns $10 from the colors because 50 x .2 = <<50*.2=10>>10
How much does Alvin earn in total? ** He earns $14 in total because 1 + 3 + 10 = <<1+3+10=14>>14
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