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Three unrelated people go for dinner to a Chinese restaurant which uses MSG in its food

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Three unrelated people go for dinner to a Chinese restaurant which uses MSG in its food. Each person has a 10% probability of developing an adverse reaction to the MSG. Let X be the number of people among the three that do develop an adverse reaction. Find the distribution of X.

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X has a binomial distribution. For binomial distribution p=0.1 q=0.9 and n=3
Now P(X=r)=C(n,r)*p^r*q^(n-r)
^ means raised to the power of
You can calculate the values now:
X P(X)
0 C(3,0)*0.1^0*0.9^3=0.9^3=0.729
1 C(3,1)*0.1^1*0.9^2=0.243
2 C(3,2)*0.1^2*0.9^1=0.027
3 C(3,3)*0.1^3*0.9^0=0.001.