We are given a probability distribution table for the number of goals scored by a soccer player. We need to find the value of $P(1 \le x \le 3)$. The probability values for $x=0, 1, 2, 3, 4, 5$ are $0.07, 0.14, k, 0.46, 0.08, 0.02$ respectively.

Probability and StatisticsProbability DistributionProbabilityExpected ValueDiscrete Probability
2025/3/16

1. Problem Description

We are given a probability distribution table for the number of goals scored by a soccer player. We need to find the value of P(1x3)P(1 \le x \le 3). The probability values for x=0,1,2,3,4,5x=0, 1, 2, 3, 4, 5 are 0.07,0.14,k,0.46,0.08,0.020.07, 0.14, k, 0.46, 0.08, 0.02 respectively.

2. Solution Steps

First, we need to find the value of kk. Since the sum of all probabilities in a probability distribution must equal 1, we have:
0.07+0.14+k+0.46+0.08+0.02=10.07 + 0.14 + k + 0.46 + 0.08 + 0.02 = 1
0.77+k=10.77 + k = 1
k=10.77k = 1 - 0.77
k=0.23k = 0.23
Now we need to find P(1x3)P(1 \le x \le 3). This is equal to P(x=1)+P(x=2)+P(x=3)P(x=1) + P(x=2) + P(x=3).
P(1x3)=P(x=1)+P(x=2)+P(x=3)=0.14+k+0.46P(1 \le x \le 3) = P(x=1) + P(x=2) + P(x=3) = 0.14 + k + 0.46
Since k=0.23k=0.23, we have
P(1x3)=0.14+0.23+0.46=0.83P(1 \le x \le 3) = 0.14 + 0.23 + 0.46 = 0.83

3. Final Answer

0.830.83

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