Question

Andy has a collection of movie dvds. in andys collection 3/5 of the dvds are action 1/4 of the dvds are comedy. andy said that 4/9 of his collection is action or comedy. cynthia said that andy made an errer. explain wether andy is correct or incorect and why.

Answer 1

This question is based on greatest common multiple.

Answer:

Cynthia is right that Andy made an error.

Step-by-step explanation:

As per Andy, action dvds are = $\frac{3}{5}$

And comedy dvd's are = $\frac{1}{4}$

So, in total these become = $\frac{3}{5}+ \frac{1}{4}$

= $\frac{12+5}{20}$ = $\frac{17}{20}$

This is not 4/9 as per Andy.