Respuesta :
Total Number of rulers = 15 + 10 = 25
Rulers with marking = 15
Rulers without marking = 10
P(with marking, then without marking) = ( 15/25 ) ( 10 /24 ) = 1/4
Answer: 1/4
Rulers with marking = 15
Rulers without marking = 10
P(with marking, then without marking) = ( 15/25 ) ( 10 /24 ) = 1/4
Answer: 1/4