Answer: A) 12 & 7 Explanation: x – y = 5 4x – 6y = 6 x = 12 y = 7

Answer: B) B Explanation: 'Extensively' is describing the verb 'flew' and should be placed after the verb and thus the correct phrase should be 'extensively over'. The error is in the second part of the sentence.

Answer: B) Data in ROM is non volatile, that is, it remains there even without electrical power Explanation:

टेलीफोन का आविष्कार अलेक्जेंडर ग्राहम बेल ने किया था। सही उत्तर है (ए) अलेक्जेंडर ग्राहम बेल। बेल को टेलीफोन के विकास में उनके अग्रणी काम के लिए व्यापक रूप से पहचाना जाता है, और उन्हें 1876 में टेलीफोन के आविष्कार के लिए पहला अमेरिकी पेटेंट प्राप्त हुआ।

Answer: C) 16/25 Explanation: If there are total 100 candidates, 40 candidates are really capable and 60 candidates are incapable.Of the candidates who are really capable = 80% 40*(80/100)=32 pass the test andof the incapable= 30%60*(30/100)=18 pass the test.Total candidates who passed the test = 32+18 = 50The proportion of the really capable students who can pass the test to the total students who can pass = 32/50 = 16/25.