Respuesta :
Solution: Karim has to do the below calculation using the calculator:
[tex]3250 \times 3[/tex]
We know that the correct answer of this calculation is:
[tex]3250 \times 3 =9750[/tex]
But Karim has entered one of the digits of 3250 incorrectly and he has got the answer 900 more than the correct answer.
Therefore, Karim has got [tex]Correct-Answer + 900=9750+900=10650[/tex]
Let x be the number that Karim entered instead of 3250. Therefore, we have:
[tex]x \times 3 =10650[/tex]
[tex]x=\frac{10650}{3}[/tex]
[tex]x=3550[/tex]
So it means Karim has entered 3550 instead of 3250. Hence, he has entered digit 2 incorrectly.
Therefore, the option d. 2 is correct
The numbers Karim is calculating are = 3250*3
1 digit is entered wrongly of the digit 3250
[tex]3250\times3=9750[/tex]
As the answer Karim gets on calculating the wrong digits is 900 more than the actual answer, so
[tex]9750+900=10650[/tex]
[tex]\frac{10650}{3}=3550[/tex]
Hence, Karim entered '2' wrong.
