Question

in a committee 50 people speak French,20 spy Spanish and 10 speak both Spanish and French.how many speak at least one of these two languages?​

Answer 1

Answer:

55 French and 25 Spanish

Answer 2

Answer

1. Let M be the number of people who speak French.
2. Let N be the number of people who speak Spanish.
3. Let MN Number of people who speak both French and Spanish.

Hence

$\sf (MN = M + N - MN) \\ </p><p>\sf = 50 + 20 -10 \\ </p><p>\sf = 70 - 10 \\ </p><p>\bf = 60$

Therefore , 20 people can speak both french and spanish.