book Maths Puzzle Numerical Ability

Given an unlimited supply of red, white, and green jellybeans, in how many ways can 10 jellybeans be selected?

a) without restrictions
b)if there nmust be atleast one of each

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book Other Question
log4(5x-1)=3 I feel stupid asking this question but, Is there a differnce between a logarithm of a product and the product of a logarithm? If there is a differnce can you explain it to me?