B2. From $4 \mathrm{~kg}$ of nuts, we get 140 dag of kernels.

A What percentage of the mass do the kernels represent?

B For the filling, we need 50 dag of kernels. How many kg of nuts do we need for this purpose? Round the result to two decimal places.

C What is more cost-effective to buy: whole unshelled nuts at 6 EUR (we shell them by hand) or kernels at 20 EUR per kg?
B2 The kernels represent $\frac{1.4 \mathrm{~kg}}{4 \mathrm{~kg}}=0.35=35 \%$ of the mass.

For 50 dag of kernels, we need $\frac{50}{0.35} \approx 142.8 \mathrm{dag}=1.43 \mathrm{~kg}$

From a kilogram of whole nuts, for which we subtract 6 EUR, we get $0.35 \mathrm{~kg}$ of kernels. If we buy the same amount of nut kernels, we subtract $0.35 \cdot 20 \mathrm{EUR}=7 \mathrm{EUR}$. It is more advantageous to buy whole nuts.

A The calculated percentage of mass $\frac{1.4 \mathrm{~kg}}{4 \mathrm{~kg}}=0.35=35 \% \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots$
Note: Writing only the percentage will not earn a point.

B The calculated mass of nuts $\frac{50}{0.35}=142.8 \mathrm{dag}=1.43 \mathrm{~kg} \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \mathrm{mt} \mathbf{t}$ Note: If the result is not correctly rounded, one point will be deducted.

C Comparison of prices for the same amount of kernels, e.g.: From a kilogram of whole nuts, for which we subtract 6 EUR, we get $0.35 \mathrm{~kg}$ of kernels. If we buy the same amount of nut kernels, we subtract $0.35 \cdot 20 \mathrm{EUR}=7 \mathrm{EUR}$. 1 t

Written answer, e.g.: It is more advantageous to buy whole nuts. .