Question

How many students Ice skate and ski

Answer 1

Answer:

Cathode rays (also called an electron beam or an e-beam) are streams of electrons observed in vacuum tubes. If an evacuated glass tube is equipped with two electrodes and a voltage is applied, the glass opposite the negative electrode is observed to glow from electrons emitted from the cathode.

Answer 2

A winter resort took a poll of its 350 visitors to see which winter activities people enjoyed. The results were as follows: 178 liked to ski, 154 liked to snowboard, 57 liked to ice skate, 49 liked to ski and snowboard, 15 liked to ski and ice skate, 2 liked to snowboard and ice skate, and 2 liked all three activities.