Question

A={(x,y):2x+4y=5 and x,y are counting numbers then |A| what​

Answer 1

Answer:

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Answer 2

Answer:

4

Step-by-step explanation:

It is given that 0<x,y<30.

Now for x to be divisible by 2 and 3, it has to be a multiple of 6.

Hence

x=6,12,18,24 ...(i) since 0<x<30.

And for y to be divisible by both 4 and 5, it has to be a multiple of 20.

Hence

y=20 ...(ii) since 0<y<30

Hence we get the ordered pairs as

(6,20),(12,20),(18,20),(24,20).

Hence 4 ordered pairs.