The number of times both spinners land on res is 84.work out an estimate for the number of times both spinners land on blue.

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The number of times both spinners land on res is 84.work out an estimate for the number of times both spinners land on blue.

Mathematics ##
Comments (2) on “The number of times both spinners land on res is 84.work out an estimate for the number of times both spinners land on blue.”

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56

Step-by-step explanation:

P(red & red) = 0.5×0.6 = 0.3

P(blue & blue) = 0.5 × 0.4 = 0.2

84 = N(0.3)

N = 280

Expected no. of both blue:

280 × 0.2 = 56

56

Step-by-step explanation:

probabilty of both being red= 0.5*0.6

total no of times spinners were spun = 84/(0.5*0.6) = 280

probabilty of both being blue= 0.5*0.4

Estimate = 0.5*0.4*280= 56