This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
a. 15 lakhs make 15 lakhs.

b. 15 million = 15,000,000
1 lakh = 1,00,000
So in 15 million, there are 150 lakhs.

c. 2 crore = 2,00,00,000
1 lakh = 1,00,000
So in 2 crore, there are 200 lakhs.

2. No, the place value of a number never change, no matter which system we use. It remains same. 
The place value doesn't depend on the system used. The system only helps in reading the number.
The place value of 5 in 3,45,62,117 is 500000 in both systems.

1 5 1
In international system, we write it as 500,000
In Indian system, we write it as 5,00,000
Both have same value.