Question

There is a heap of 1000 balls uniquely numbered from 1 to 1000. If the last digit of the ball is 0, it is put into bucket o, if the last digit of the ball is 1 it is put into bucket 1 and so on. Siva then picks out all the balls from buckets ending in 3 or 7 and puts them into bucket 10 off how many balls in bucket

Answer 1

Answer:

There will be a total of 210 balls in bucket 10

Answer 2

Answer:

The answer is 182

Step-by-step explanation:

• First we have to find out number of balls ending with 3
• In case of single digit number there is only one ball
• in case of 2 digit numbers the tens place can be filles with 9 different digits but ones place can be filled with a single digit that is 3 so number of balls ending with 3 are $9*1 = 9$
• Now number of 3 digit balls ending with 3 are $9*9*1 = 81$
• Same goes for balls ending with 7
• so on adding all the balls we get 182
  Hence number of balls are 182