Subject
Bank Exam
Topic
Jamuna Bank Ltd. - Probationary Officer - 2017
The average of x and y is 40 and the average of y and z is 35. What is the value of x - z?( x এবং y এর গড় 40, y এবং z এর গড় 35 হলে (x - z) এর মান কত?)
The average of x and y is 40 and the average of y and z is 35. What is the value of x - z?( x এবং y এর গড় 40, y এবং z এর গড় 35 হলে (x - z) এর মান কত?)
ক)
5খ)
10গ)
15ঘ)
NoneExplanation
দেওয়া আছে, x এবং y এর গড় 40 (x + y)/2= 40 ⇒ x + y = 80 ..........(1) আবার, y এবং z এর গড় 35 (y + z)/2 = 35 ⇒ y + z = 70 ..........(2) (1) নং সমীকরণ হতে (2) নং সমীকরণ বিয়োগ করে পাই, (x+y) - (y+z) = 80 - 70 ⇒ x + y - y - z = 10 x - z = 10Related questions
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