There are 15 books on the shelf. All of the books are either about Winston Churchill or Queen Elizabeth. There are twice as many books about Winston Churchill than there are about Queen Elizabeth. How many books are there about Winston Churchill?
10
there r 10 about WC and 5 about QE
To find the number of books about Winston Churchill, we need to set up an equation based on the given information.
Let's suppose the number of books about Queen Elizabeth is x. Since there are twice as many books about Winston Churchill, the number of books about him would be 2x.
According to the problem, the total number of books on the shelf is 15. Therefore, we can set up the equation:
x + 2x = 15
Combining the similar terms on the left side, we have:
3x = 15
Now, to solve for x, we divide both sides of the equation by 3:
3x/3 = 15/3
x = 5
So, there are 5 books about Queen Elizabeth (x = 5) and since there are twice as many books about Winston Churchill, there must be 2 * 5 = 10 books about Winston Churchill.