In a group 80% speak English, 40% speak Hindi and 80 person speak both language then find the number of people who speak only English, ( Please solve and explain )
a) 300
b) 280
c) 260
d) 240
Answers
Answer:
320
this is a simple ‘set theory’ problem; if 80% people speak english and 40% people speak hindi, according to the set theory, if we draw a venn diagram we can visualize that a set of 20% people who speak both languages is the intersection of both the different sets.
once we know that the value of this 20% is 80, it is easy to find out the value of 80% i.e. 80*4=320, which is the number of people speaking english.
Step-by-step explanation:
320
this is a simple ‘set theory’ problem; if 80% people speak english and 40% people speak hindi, according to the set theory, if we draw a venn diagram we can visualize that a set of 20% people who speak both languages is the intersection of both the different sets.
once we know that the value of this 20% is 80, it is easy to find out the value of 80% i.e. 80*4=320, which is the number of people speaking english.