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# If P = {1, 2, 3, 4, 5} and P U Q = {1, 2, 3, 4, 5, 6, 7}, list the elements in Q

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**If P = {1, 2, 3, 4, 5} and** **P U Q = {1, 2, 3, 4, 5, 6, 7}, list the elements in Q**

**A. {6}****B. {5, 7}****C. {6, 7}****D. {7}**

**QUICK ANSWER…**

**C**

**SOLUTION****… **** **

**If P = {1, 2, 3, 4, 5} and**

**P U Q = {****1, 2, 3, 4, 5, 6, 7****}, then the elements in Q must include 6 and 7**

**Now for the right answer to the above question:**

**Option A is incorrect.****Option B is incorrect.****C is correct.****D is not the correct answer.**

**KEY-POINTS…**

**You may please note the****se/this****:**

**Elements in Q must include 6 and 7 in other to make the set true.****Q will either contain only 6 and 7, or 6, 7, plus any number or numbers in P.**

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**/ culled from 2015 JAMB-UTME mathematics past question 34 /**