. A boy has four trousers and 7 shirts. In how many different ways can he select a trouser and a shirt?
Choose the correct option.
A) 18  B) 20  C) 26  D) 28  E) 30
Explanation:   The boy can select one trouser in four ways.   The boy can select one shirt in 7 ways.   The number of ways in which he can select one trouser and one shirt is   4 * 7= 
<gadget id="calculator">  4 * 7</gadget>
<output>28</output>
28 ways.   Answer: Option 30
<result>E</result>
. A boy has four trousers and 7 shirts. In how many different ways can he select a trouser and a shirt?