Question

a box contains cards number from 7 to 20 find the probability that the card drawn is a prime number less than 15

Answer 1

HEYA!MATE

STEP BY STEP EXPLANATION

THE BOX OF CARD CONTAINS CARD FROM NO. 7 TO 20...

OUR FAVORITE OUTCOME OR NO.= LESS THAN 15

SO,THE PROBABILITY=FAVORITE OUTCOME÷TOTAL NO. OF OUTCOME

THE TOTAL NO. AVAILABLE =14

SO, THE PROBABILITY =8÷14 OR 8/14
4÷7 OR 4/7

PRIME NO. LESS TAN 15 ARE 7,11 AND 13

SO, THE PROBABILITY IS 3÷14 OR 3/14

HOPE YOU UNDERSTAND...

Answer 2

S=(7,8,9,10,11,12,13,14,15,16,17,18,19,20)
N(S)=14

A=event of getting prime number less than 15
A=(7,11,13)
N(A)=3

Probabilty of A=n(A)/n(S)
=3/14

This is the correct answer