World Languages, asked by dainvincible1, 1 year ago

What percentage of numbers from 1 to 70 have 1 or 9 in the unit's digit?

Answers

Answered by Nikhil21122

it is 10%.
there are 7 time nine in unit digit:- 09,19,29,39,49,59,69

siv2: it was either 1 or 9 but u have considered only 9

Answered by siv2

09,19,29...69 = 7
01 ... 61 = 7
total 14
percentage = 14/70*100 = 20%

check youtube channel- corephysics for more advanced physics problems. its worth trying

Nikhil21122: how 14

Nikhil21122: ?????

siv2: consider 1 or 9 in units place only

siv2: 01 11 21 31 41 51 61, 09 19 29 39 49 59 69

siv2: all these no.s have either 1 or 9 in units place

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