Question

15. In a survey, out of all students,53 % said "no". 20 % said "yes" and the
remaining said 'They could not decide'. If a student is chosen at random
what is the chance that the student did not say "no"?"​

Answer 1

Step-by-step explanation:

TOTAL OUTCOMES = 100

POSSIBLE OUTCOMES THAT THE CHOOSEN STUDENT SAID NO =

100-53=47%

PROBABILITY, P(E) = POSSIBLE/TOTAL OUTCOMES

47/100

Answer 2

Given : In a survey, out of all students

53 % said "no"

20 % said "yes"

and the  remaining said 'They could not decide'.  

a student is chosen at random

To Find: chance that the student did not say "no"

Solution:

all students = 100 %

NO  = 53  %

YES = 20 %

Could not decide = 100 % - 53 % - 20 %  = 27 %

student did not say "no"  = 100 % - Said YES

= 100 % - 53 %

= 47 %

or   student did not say "no"   = Students said YES + Students said Could not decide

= 20 + 27

= 47 %

47 % = 0.47

chance that the student did not say "no"  = 0.47

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