The formula for a semi-circle is 3.14*d / 2 + the triangle
and d= 20 because the triangle is a equilateral so 3.14*20=62.8 and divide by 2 for it is the half of the circle 62.8 / 2 = 31.4 and add the triangle 31.4+40 because of the 2 sides 31.4+40=70.4
Prob (first defective) = 4 / 20 = 1/5
Prob(2nd defective) = 3/19
Prob (3rd defective) = 2/18 = 1/9
Pron 4th defective) = 1/ 17
Prob ( all 4 defective) = 1/5 * 3/19 * 1/9 * 1/17 = 1 / 4845 answer
Answer:
There are 270 red sweets in the bag
There are 630 sweets in the bag in total
4 x 90 = 360
3 x 90 = 270
369 + 270 = 630
Answer:
(1/10)x = 11/12
x=11/12×10/1=110/12=55/6or9 1/6
5/10 is equivalent to 1/2. Because if you divide it the nominator and devident by 5 you get 1/2