AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

The initial count of bacteria is x and it becomes y times every day. The total count of bacteria from the following choices after one week is:

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

7 x y

x + 7 y

x y 7

x y 6

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Given that, the initial count of bacteria is x.

x

bacteria multiplies

y

times every day.
We have to find the total count of bacteria in a week.
Therefore the number of bacteria on the

2 n d

day

= x y

.
On the

3 r d

day ,number of bacteria will be

= x y 2

.
Similarly on the

4 t h

day and

5 t h

day the number of bacteria will be

xy^{3}, xy^{4}

respectively.
On the

6 t h

day and

7 t h

day, the count of bacteria will be

xy^{5}

and

xy^{6}

.
At the end of the

7 t h

day and that is on the

8 t h

day the number of bacteria

= xy^{7}

.
So, the total count of bacteria after 1 week is

xy^{7}

.
Hence, option 3) is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!