If a/2 = b/3 = c/5, then the value of (a + b + c) / c is:

मान लीजिए a/2 = b/3 = c/5 = k। तब a=2k, b=3k, c=5k। (2k + 3k + 5k) / 5k = 10k / 5k = 2।