In a class of 60 students, 21 sign up for chorus, 29 sign up for band, and 5 take both. 15 students in the school are not enrolled in either band nor chorus. How many students take only chorus.

A. 21
B. 26
C. 24
D. 16

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given