Learn to Create a Robotic Device Using Arduino in the Free Webinar. Register Now
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91-120-4616500
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Free webinar on Robotics (Block Chain) Learn to create a Robotic Device Using Arduino
30th Jan @ 5:00PM for Grade 1 to 10
How many integers between 999 to 9999 either begin or end with 3 ? How many integers between 999 to 9999 either begin or end with 3 ?
Let A : the set of integers between 999 and 9999 begin with 3Let B : the set of integers between 999 and 9999 ends with 3A = 1 * 103 (begin with 3= 9:1, 9:10, 9:10, 9:10)B = 9 * 10 * 10 * 1 (end with 3= 9:9, 9:10, 9:10, 9:1)AB = 1 *102 *1 (begin and end with 3 9:1, 9:10, 9:10, 9:1)AU B = A + B - AB= 103 + 900 – 100= 1000 + 900 – 100= 18008
Post Question
Dear , Preparing for entrance exams? Register yourself for the free demo class from askiitians.
points won -