A Survey Of A Village Showed That 1 / 10 Of The Total Population Spea

1.	A Survey Of A Village Showed That 1 / 10 Of The Total Population Speak Neither Hindi Nor English. 1 / 5 Of Them Cannot Speak English And 3 / 7 Of Them Cannot Speak Hindi. What Percentages Of People Know Only One Language ?
Answer» persons who can SPEAK ENGLISH = 1 - (1/5) = 4/5 persons who can speak Hindi = 1 - (3/7) = 4/7 persons who can speak any or both = 1 - 1/10 = 9/10 so TOTAL persons speak both = 4/5 + 4/7 - 9/10 = 33/70 persons speak any = 1 - 33/70 - 1/10 = 3/7 % = 300/7% = 42.86% persons who can speak English = 1 - (1/5) = 4/5 persons who can speak Hindi = 1 - (3/7) = 4/7 persons who can speak any or both = 1 - 1/10 = 9/10 so total persons speak both = 4/5 + 4/7 - 9/10 = 33/70 persons speak any = 1 - 33/70 - 1/10 = 3/7 % = 300/7% = 42.86%

A Survey Of A Village Showed That 1 / 10 Of The Total Population Speak Neither Hindi Nor English. 1 / 5 Of Them Cannot Speak English And 3 / 7 Of Them Cannot Speak Hindi. What Percentages Of People Know Only One Language ?

Answer»

persons who can SPEAK ENGLISH = 1 - (1/5) = 4/5

persons who can speak Hindi = 1 - (3/7) = 4/7

persons who can speak any or both = 1 - 1/10 = 9/10

so TOTAL persons speak both = 4/5 + 4/7 - 9/10 = 33/70

persons speak any = 1 - 33/70 - 1/10 = 3/7

% = 300/7% = 42.86%

persons who can speak English = 1 - (1/5) = 4/5

persons who can speak Hindi = 1 - (3/7) = 4/7

persons who can speak any or both = 1 - 1/10 = 9/10

so total persons speak both = 4/5 + 4/7 - 9/10 = 33/70

persons speak any = 1 - 33/70 - 1/10 = 3/7

% = 300/7% = 42.86%

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