question_answer

There are 30 pens left at a school store after Siri buys a certain number of pens, p. Devi buys 4 times as many pens as Siri. The given expression shows the number of pens left at the store after Devi buys her pens. \[30-4\times p\] How many pens remain at the store if Siri bought 3 pens?

A)  14                         

B)  18    

C)  78         

D)         104