Question
In how many ways can a squad of 10 people be selected
from 9 trainees and 5 supervisors such that the squad has at least 8 trainees?Solution
Case I: 8 trainees and 2 supervisors
Number of ways = 9C8 × 5C2 = 9 × 10 = 90 ways
Case II: 9 trainees and 1 supervisor
Number of ways = 9C9 × 5C1 = 1 × 5 = 5 ways
Total number of ways = 90 + 5 = 95 ways
In a certain code language, SHIRT is coded as RGGSU and HOUSE is coded as GNSTF. In the same code language, how will PRINT be coded as?
Study the arrangement of number and letter carefully and answer the following questions.
C 9 I B 5 W E 8 V 7 K N X 8 9 D 6 P 9 A 6 O J S B 6 ...
This question is based on the five, three-digit numbers given below:
(Left) 158 438 182 325 230 (Right)
If 5 is added to the first digit o...
Select the combination of letters that when placed sequentially in the blanks of the given series will complete the series.
T _ O _ _ W W _ O ...
- How many alphabets are immediately preceded by a number?
How many such letters are there which are not immediately followed by a symbol between ‘@’ and ‘I’ in the given arrangement?
Select the correct combination of letters when sequentially placed in the blanks of the given letter will complete the series.
l l m _ _ _ n o o ...
In the given series, how many vowels are immediately succeeded by a number?
Four of the five are related to each other in a certain way, then find the odd one out?
Arrange the words in the alphabetical order and pick the one that come at second last.
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