csat-suneung 2022 Q25 (Probability and Statistics)

csat-suneung · South-Korea · csat__math 3 marks Combinations & Selection Counting Integer Solutions to Equations
How many ordered pairs $( a , b , c , d , e )$ of natural numbers satisfy the following conditions? [3 points]
(a) $a + b + c + d + e = 12$
(b) $\left| a ^ { 2 } - b ^ { 2 } \right| = 5$
(1) 30
(2) 32
(3) 34
(4) 36
(5) 38
How many ordered pairs $( a , b , c , d , e )$ of natural numbers satisfy the following conditions? [3 points]\\
(a) $a + b + c + d + e = 12$\\
(b) $\left| a ^ { 2 } - b ^ { 2 } \right| = 5$\\
(1) 30\\
(2) 32\\
(3) 34\\
(4) 36\\
(5) 38