1. **State the problem:** We have 240 students total. Among them, 176 are on the honor roll (set $H$), 48 are members of the varsity team (set $V$), and 36 are in both groups (set $B = H \cap V$). We want to find how many students are in neither group (set $N$).
2. **Formula used:** The principle of inclusion-exclusion for two sets states:
$$|H \cup V| = |H| + |V| - |H \cap V|$$
where $|H \cup V|$ is the number of students in honor roll or varsity or both.
3. **Calculate the number in $H \cup V$:**
$$|H \cup V| = 176 + 48 - 36 = 224 - 36 = 188$$
4. **Calculate the number in neither group $N$:**
Since total students are 240,
$$|N| = 240 - |H \cup V| = 240 - 188 = 52$$
5. **Summary:**
- Students on honor roll only: $|H| - |B| = 176 - 36 = 140$
- Students on varsity only: $|V| - |B| = 48 - 36 = 12$
- Students in both: $36$
- Students in neither: $52$
This matches the Venn diagram areas: green only (140), blue only (12), yellow overlap (36), pink outside (52).
Venn Diagram 515E68
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