. Given five different green dyes, four different blue dyes and three different red dyes
how many combinations of dyes can be chosen taking at least one green and one blue dye
Best Answer
Answer: Out of 5 different green dyes, at least one can be selected in
Similarly, out of four different blue dyes at least one blue dye can be selected in (24-1)= 15 ways
After selecting at least one green and at least one blue dye as above, red dye can be selected in 23=8
Hence the total number of combination of dyes= 31 x 15 x 8 = 3720
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