Answers

2016-03-02T19:41:08+05:30
People less than 20 are only 30
Total people are 120
P(getting a person less than 20)= 30/120= 1/4
0
2016-03-02T19:48:48+05:30
PROBABILITY FORMULA=TOTAL PEOPLE/TOTAL CHANCE OF GETTING
SO= NO. OF 20 YEARS LESS PEOPLE IS 120 - 90= 30
THEREFORE 120/30
= 4
4 IS PROBABILITY OF GETTING LESS THAN 20 YEARS.
  HOPE IT HELP
0