+0  
 
0
152
1
avatar+3270 

Let A equal the number of four digit odd numbers. Let B equal the number of four digit multiples of 5. Find \(A+B\) .

tertre  Feb 17, 2018

Best Answer 

 #1
avatar+13621 
+1

There are  9000 numbers between 1000 and 9999 (inclusive)

  Half of these are odd numbers    A = 4500

1000 is divisible by 5  as is 9995      1 + (9995-1000)/5 = 1800 = B

 

A+B = 4500 + 1800 =  6300

ElectricPavlov  Feb 17, 2018
 #1
avatar+13621 
+1
Best Answer

There are  9000 numbers between 1000 and 9999 (inclusive)

  Half of these are odd numbers    A = 4500

1000 is divisible by 5  as is 9995      1 + (9995-1000)/5 = 1800 = B

 

A+B = 4500 + 1800 =  6300

ElectricPavlov  Feb 17, 2018

25 Online Users

avatar
avatar
avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.