In an examination 80% pass in english, 70%pass in maths , 10%fail in both ,
144 pass in both . How many all appeared to the test?  Choose the most appropriate option.
A) 260 B) 240 C) 370 D) 120 E) 150
E : 80%, Fail in both: 10%, therefore only M pass is 10%   M: 70%, fail in both: 10%, therefore only E pass is 20%   100% = all fail + only E pass + only M pass + both E and M   pass   100%=10%+20%+10% + both E and M pass   Therefore, both E and M pass = 60%   60%=&gt; 144   100% =&gt; 240   Answer: 240
<result>B</result>
In an examination 80% pass in english, 70%pass in maths , 10%fail in both ,
144 pass in both . How many all appeared to the test?