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i am confused... 

 Apr 14, 2018
 #1
avatar+7354 
+1

1.

num of students that like TV but not video games  =  num of students that like TV - num of students that like both TV and video games

 

num of students that like TV but not video games  =  34 - 8

 

num of students that like TV but not video games  =  26

 Apr 14, 2018
 #2
avatar+7354 
+1

2.   Let's look at each pair of numbers.

 

Could  (4, 6)  represent event A?

Is  4 + 6  greater than  7  ?  yes

Is  4 + 6  a multiple of  4  ?  no

Therefore (4, 6) could not represent event A.

 

Could  (4, 3)  represent event A?

Is  4 + 3  greater than  7  ?  no

Is  4 + 3  a multiple of  4  ?  no

Therefore  (4, 3)  could not represent event A.

 

Could  (6, 6)  represent event A?

Is  6 + 6  greater than  7  ?  yes

Is  6 + 6  a multiple of  4  ?  yes

Therefore  (6, 6)  could represent event A.

 

Could  (5, 4)  represent event A?

Is  5 + 4  greater than  7  ?  yes

Is  5 + 4  a multiple of  4  ?  no

Therefore  (5, 4)  could not represent event A.

 

Could  (3, 5)  represent event A?

Is  3 + 5  greater than  7  ?  yes

Is  3 + 5  a multiple of  4  ?  yes

Therefore  (3, 5)  could represent event A.

 

Could  (1, 5)  represent event A?

Is  1 + 5  greater than  7  ?  no

Is  1 + 5  a multiple of  4  ?  no

Therefore (1, 5) could not represent event A.

 Apr 14, 2018
 #3
avatar+99397 
+2

Last one

 

P(Red )  =  25 / ( 25 + 95)  = 25/120

P(Blue)  =  95 / 120

 

These events are complementary because  25/120 + 95 / 120  =  120 / 120  =  1

 

 

cool cool cool

 Apr 15, 2018

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