bag contains 7 green and 8 white balls. if two balls are drawn simultaneously, the probability that both are of the same colour is -. Choose the most appropriate option:
A) 7 / 15
B) 2 / 8
C) 7 / 11
D) 13 / 5
E) 87
<gadget id="calculator">factorial(7)</gadget>
<output>5_040</output>

<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">factorial(5)</gadget>
<output>120</output>

<gadget id="calculator">factorial(2)</gadget>
<output>2</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">5_040 / 240</gadget>
<output>21</output>

<gadget id="calculator">factorial(8)</gadget>
<output>40_320</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">factorial(6)</gadget>
<output>720</output>

<gadget id="calculator">720 * 2</gadget>
<output>1_440</output>

<gadget id="calculator">40_320 / 1_440</gadget>
<output>28</output>

<gadget id="calculator">21 + 28</gadget>
<output>49</output>

<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">factorial(15)</gadget>
<output>1_307_674_368_000</output>

<gadget id="calculator">15 - 2</gadget>
<output>13</output>

<gadget id="calculator">factorial(13)</gadget>
<output>6_227_020_800</output>

<gadget id="calculator">6_227_020_800 * 2</gadget>
<output>12_454_041_600</output>

<gadget id="calculator">1_307_674_368_000 / 12_454_041_600</gadget>
<output>105</output>

<gadget id="calculator">49 / 105</gadget>
<output>7/15 = around 0.466667</output>

<result>A</result>
bag contains 7 green and 8 white balls. if two balls are drawn simultaneously, the probability that both are of the same colour is -.
divide(add(divide(factorial(7), multiply(factorial(subtract(7, const_2)), factorial(const_2))), divide(factorial(8), multiply(factorial(subtract(8, const_2)), factorial(const_2)))), divide(factorial(add(7, 8)), multiply(factorial(subtract(add(7, 8), const_2)), factorial(const_2))))
explanation : drawing two balls of same color from seven green balls can be done in â  · c â ‚ ‚ ways . similarly from eight white balls two can be drawn in â  ¸ c â ‚ ‚ ways . p = â  · c â ‚ ‚ / â ¹ â  µ c â ‚ ‚ + â  ¸ c â ‚ ‚ / â ¹ â  µ c â ‚ ‚ = 7 / 15 a