exam Maths Puzzle Numerical Ability

there are 12 trumpet players in the marching band, but there is only room for 3 of them in the jazz band. how many diffrent combinations of trumpet players could be selected for the jazz band out of the 12?
a. 1728
b. 36
c. 1320
d. 220

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exam Other Question

g(m+1) if g(x)=2x^2-4x+2 find the domain of f(x)=7+ sqrt 3x+21