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?	Choose the correct choice from the following answers.
A) 100/7	B) 200/7	C) 300/7	D) 400/7	E) 500/7
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   ANSWER:200/7
<result>B</result>
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?