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Question 3 Exercise 6.4
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ion 3(a)===== A true or false test contains eight questions. If a student guesses the answer for each questio... answers are correct. ====Solution==== We have $8$ questions, each question has two options. Therefore, The s... ion 3(b)===== A true or false test contains eight questions. If a student guesses the answer for each questio... answers are correct. ====Solution==== We have $8$ questions, each question has two options. Therefore, The s
Question 7 and 8 Exercise 6.3
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ion 8===== A student is to answer $7$ out of $10$ questions in an examination. How many choices has he, if he must answer the first $3$ questions? ====Solution==== Option to choose different $7$ questions out of $10$ to answer are: $${ }^{10} C_7=\dfrac... must answer the first three, then the remaining questions are $7$ out of which he has to answer $4.$ In th