Answer:
Givens
- Morita outs 10 flowers in each case.
- 2/10 of the flowers are daisies.
- Morita makes 4 arrangements.
We know that Morita arranges 4 cases, each of them has 10 flowers.
So, if there are 2/10 daisies per case, that means each can contains 2 daisies.
But, she did 4 arrangements. There are 2x4 = 8 daisies in total.
Now, last weekend, Morita used 10 daisies to make flower arrangements, and we know she tend to use 2/10 of the flowers as daisies, that means this fraction represents daisies,

Therefore, there are 50 flowers in total.