Kevin is mixing a wild bird feed . He needs to use seeds a , b , c in the ratio 3:5:1 by weight.

Question

Kevin needs to make 360g of the seed mix. He has 150 g of seeds A , 205 g of seeds B and 30 g of seed C.
does he have enough seeds

Answer 1

3+5+1 = 9
360/9 = 40 -- multiply the ratios by 40 to get
3:5:1 = 120:200:40
Looks like he's 10g short on C seeds

Answer 2

If you look at the ratio one way you ahve
3x + 5x + 1x = 360
So each x is worth ....
9x = 360 divide both sides by 9
x = 40
the ratio is 3x:5x:1x
So the numbers you need are 3(40) of birdseed A
5(40) of birdseed B
1(40) of birdseed C...
so... do you have enough??
Again,... this is just one way to solve it (gr 9 easy way)