Dillesh4096 wrote:
dcummins wrote:
Raffle tickets numbered consecutively from 151 through 352 are placed in a box. What are the chances that a ticket selected at random will have a number with a tens digit of 7?
A. 2/7
B. 3/15
C. 10/101
D. 20/201
E.21/201
A. 2/7
B. 3/15
C. 10/101
D. 20/201
E.21/201
Total number of digits with 7 in ten's digit from 151 through 352 = {157, 167, 177, . . . . . . . . . 347} = 20
Total digits = 352 - 151 + 1 = 202
Probability = 20/202 = 10/101
IMO OptionC
Dillesh4096 wrote:
dcummins wrote:
Raffle tickets numbered consecutively from 151 through 352 are placed in a box. What
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