Question

Are you good at solving logical problems?
A Science teacher assigned an essay about viruses, bacteria and vaccines. The
teacher noticed that out of 100 students, 50 of them wrote about viruses, 20 wrote
about bacteria and 12 wrote about both viruses and bacteria. How many of the 100
students wrote about vaccines?

Answer 1

Resposta:

Traducao:

Vc e bom em resolver problemas logicos?

Um professor de ciencias faz um texto sobre virus,bacterias e vacinas.

A professora  percebeu que dos 100 estudantes, 50 escreveram sobre virus, 20 escreveu sobre bacteria e 12 escreveu sobre virus e bacteria. Quantos dos 100 estudantes escreveu sobre vacinas?

R:18 estudantes