linyibaidu
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
linyibaidu
linyibaidu
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
General
Tina has 20 rings. In how many ways can she select a set of 3 rings? A. 1140B. 1000C. 950D. 850
5 months ago
Q:
Tina has 20 rings. In how many ways can she select a set of 3 rings? A. 1140B. 1000C. 950D. 850
Accepted Solution
A:
Hello! The answer to your question would be as followed:20 / (3 * (20 - 3)) 20 / (3 * 17!) 20 * 19 * 18 * 17 / (6 * 17) 20 * 19 * 18 / 6 20 * 19 * 3 20 * 57 =1140