বাংলাদেশ ব্যাংক অফিসার ০২ -১২-২০২২

3x+2y=8

Let the number of buffaloes be x and the number of ducks be y. 

Let x and y be the respective km's travelled by man via taxi and by his own car.
Given x + y = 135 => x = 135- y
But according to the question,
7x + 6y = 900
7(135-y) + 6y = 900
=> 945 - 7y + 6y = 900
=> y = 945 - 900= 45
=> x = 135 - 45 = 90
Therefore, the distance travelled by taxi is 90 km.

Students taking physics = 30 (these 30 include those 13 that take both)
Students taking english = 25 (these 25 also include those 13)

So those that take either physics or english or both = 30 + 25 - 13 = 42.

Required percentage = 42/90 * 100 = 47% approx

Temperature on the fourth day
= [(40.2 × 4 + 41.3 × 4) - (40.6 × 7)]° C
= 41.8° C

2x + 3y = 100 ..... (1)
3x + 2y = 120 ..... (2)
Multiply by 3 in Equation (1) and multiply by 2 in Equation (2) and then subtract
6x+9y=300
6x+4y=240
− − − ––––––––––––––––––
5y=60
y=12
x=32

Pin point error,  এখানে to lift হবে

Incorrigible =শোধরানো যায়না এমন

Irrevocable অপরিবর্তনীয় 

Adulteration মানে ভেজাল।

Rebellious বিদ্রোহ 

Present indefinite tense যুক্ত active voice কে passive voice এ রুপান্তর করার নিয়ম-

with no illusions or pretensions; practical and realistic

The phrase “at arm’s length” means to keep at a distance, avoiding intimacy with disagreeable people. For example, “He stays at arm’s length from the board meetings involving disputes.” Hence, Option B is correct. The rest of the options do not express this meaning, hence incorrect.

Indirect speech এ must থাকলে Direct speech এ Had to বসে। কিন্তু, অপশনে Had to না থাকলে Must নিতে হবে। 

Sacrifice  ছাড়া  worship (প্রার্থনা)  হয় না। 

Mock মানে উপহাস করা এবং Imitate মানে অনুকরণ করা।

Abjure- বর্জন করা