क्या Class Topper Secretly Cheating करता था ? | Flash Card Technique #studytips

Technique of using Flash Cards

In a class, there are 18 girls and 16 boys. The class teacher wants to choose one for class monitor. What she does she writes the name of each on a card and puts them into a basket and mixes throoughly? A child is asked to pick up on card from the basket. What is the probability that the name written on the card is (i) the name of a girl? (ii) the name of a boy? (iii) the name of topper student of the class? (iv) not ''Shiv Kumar'' who is the son of Principal of this school?

The monthly salary of a person was 75,000. He used to spend on family expenses(E), Taxes(T), charity(C), and the rest were his savings, E was 60% of the income, T was 20% of E, and C was 15% of T. When his salary got raised by 40%, he maintained the percentage level of E, but T becomes 30% of E and C becomes 20% of T. The ratio of the saving of earlier to that of his present salary is: एक का मासिक वेतन ₹50,000 था। वह परिवार के खर्च (E), कर (T), दान (C) पर खर्च करता था और बाकी उसकी बचत थी। E आय का 60% था, T, E का 20% था, और C, T का 15% था। जब उसका वेतन 40% बढ़ा, तो उसने E का प्रतिशत स्तर बनाए रखा, लेकिन T, E का 30% हो गया, और C, T का 20% हो गया। उसकी पहले की बचत तथा वर्तमान बचत में क्या अनुपात है?