Question

Of 500 new electronic products, 280 were intended for people over the age of 16, and 320 used a rechargeable battery. Of those products with a rechargeable battery, 150 were intended for those under the age of 16. What is the probability that a new electronic product is intended for someone over the age of 16 or uses a rechargeable battery?

Answer 1

I have included the work and answer on the picture attached below:

Answer 2

Answer:

0.66

Step-by-step explanation:

Given that there are in total 500 new electronic products, 280 for people over age 16, 320 rechargeable battery.

of these 320, 150 were for age under 16, which implies 170 were for people over age 16.

                           Over age 16            Under age 16       Total

Rechargeable            170                        150                     320

Others                        110                           70                     180

Total                            280                       220                    500

Required probaility = Probability that a new electronic product is intended for someone over the age of 16 or uses a rechargeable battery

= $\frac{280+320-170}{500} =\frac{330}{500} \\=0.66$