Home › AP EAPCET (Engineering) › Mathematics › Permutations and Combinations › A traveller can reach a town by 4 bus routes or …
A traveller can reach a town by 4 bus routes or by 3 train routes. In how many ways can one route be chosen?
A7
B24
C1
D12
Answer & Solution
Correct answer: A. 7
The choices are mutually exclusive, so the addition principle gives 4 + 3 = 7.
Related questions
Al-Khalil's cryptography book listed words using which idea?A permutation of a finite set is what kind of function on that set?A k-combination of a set S is best described as what?Cauchy's 1815 memoir on substitutions of n elements led to which notion?Which Chinese text used permutation-like hexagrams as early as 1000 BC?How many elements does the symmetric group on 4 objects contain?In how many ways can the letters of BANANA be arranged?A multiset permutation uses each element how many times?