Answer:
C) 55
Step-by-step explanation:
upper row: 1 red possible pattern: 3
lower row: 5 space for 4 red ₅C₄ = 5
Pattern 1: 3 x 5 = 15
upper row: 2 red possible pattern: ₃C₂ = 3
lower row: 5 space for 3 red ₅C₃ = 10
Pattern 1: 3 x 10 = 30
upper row: 3 red possible pattern: ₃C₃ = 1
lower row: 5 space for 2 red ₅C₂ = 10
Total: 15 + 10 + 10 = 55
wish this is right.
Pattern 1: 3 x 10 = 30
