There are a total of 160 children in Years 4, 5 and 6 31 of these children cannot swim.
15 children in Year 4 cannot swim.
43 children in Year 5 can swim.
There are 52 children in Year 6
50 of these 52 children can swim.
(i) Work out the number of children in Year 4 who can swim.

i think the answer is b.

step-by-step explanation:

not 100% sure though.

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.

6-3=3

3*3=9

9+12=21

21/3=7

7*8=56

56 is your answer

it would be c. 25 units