Five balls of different colours are to be placed in three different boxes such that any box contains at least 1 ball What is the maximum number of different ways in which this can be done In a certain code if AIRLINE is noted as ENILRIA7 then RAILWAY will be noted as Kerala SET Exam General Paper Preparation Daily PYQ Practice 155

1)   Five balls of different colours are to be placed in three different boxes such that any box contains at least 1 ball. What is the maximum number of different ways in which this can be done?

A) 120

B) 180

C) 90

D) 150

Ans) D) 150

 

2)   In a certain code, if AIRLINE is noted as ENILRIA7, then RAILWAY will be noted as:

A) YAWILAR8

B) YAWILAR7

C) YAWLIAR8

D) YAWLIAR7

AIRLINE → ENILRIA7

Step 1: ENILRIA is the reverse of AIRLINE (i.e., AIRLINE spelled backwards).

Step 2: The number 7 appears after the reversed string.

AIRLINE has 7 letters.

[Reverse the word] + [Number of letters in the word]

Now, apply the same logic to "RAILWAY":

Reverse the word: RAILWAY → YAWLIAR

Number of letters: RAILWAY has 7 letters

coded form will be: YAWLIAR7

Ans)  D) YAWLIAR7