Example 8 - Chapter 4 Class 7 - Expressions using Letter-Numbers (Ganita Prakash)

Transcript

Example 8 Charu has been through three rounds of a quiz. Her scores in the three rounds are 7p – 3q, 8p – 4q, and 6p – 2q. Here, p represents the score for a correct answer and q represents the penalty for an incorrect answer. What is her final score after the three rounds?Now, Final score = (7p – 3q) + (8p – 4q) + (6p – 2q) = 7p + 8p + 6p – 3q – 4q – 2q = (7p + 8p + 6p) – (3q + 4q + 2q) = 21p – 9q